947.3 784.1 748.3 631.1 775.5 745.3 602.2 573.9 665 570.8 924.4 812.6 568.1 670.2 4. /FontDescriptor 21 0 R Convex lens 3 Plano Convex lens 4. >> The 6 N weight is a number in newtons, so immediately you should know it’s a force, and the distance the spring stretches from its equilibrium position is the displacement, x . experiment, they should do the calculations neatly. /FirstChar 33 /Type/Font Objective – To determine the wavelength of sodium light using Newton’s ring method. Now our task is to first find how many divisions of Main Scale are equal to Vernier Scale. 472.2 472.2 472.2 472.2 583.3 583.3 0 0 472.2 472.2 333.3 555.6 577.8 577.8 597.2 ... Multi electron interference in double slit experiment. endobj experiment. 667 667 611 278 278 278 469 556 222 556 556 500 556 556 278 556 556 222 222 500 222 Calculations. 16 0 obj endobj THE PHOTODIODE AND ITS READOUT. 722 667 611 778 778 389 500 778 667 944 722 778 611 778 722 556 667 722 722 1000 The infinitesimal area of each ring $$dA$$ is therefore given by the length of each ring ($$2 \pi r$$) times the infinitesimmal width of each ring … 0 0 0 0 0 0 0 333 278 250 333 555 500 500 1000 833 333 333 333 500 570 250 333 250 The diameter of the m th dark ring was found to be 0.28 cm and that of the (m + 10) th 0.68 cm. /FirstChar 1 EXPERIMENT No. /LastChar 255 >> Figure 2 In this diffraction grating experiment you will observe a pattern of diffracted light. Date of experiment: 16/03/2012 Date of report: 30/03/2012 Investigation of Interference Patterns and Newton’s Rings Experiment conducted by Sultan LeMarc. Theory of Fringes: The effective path difference between the two reflected rays R 1 and R 2 for a wedge shaped film from equation 2.18. 489.6 489.6 489.6 489.6 489.6 489.6 489.6 489.6 489.6 489.6 272 272 272 761.6 462.4 Example problem A series of rings formed in Newton's rings experiment with sodium light was viewed by reflection. A ring and a disk. >> The diode has a window which allows light to enter, and the cathode is a clean metal surface. stream /FirstChar 33 The central element of the apparatus is the photodiode tube. Physclips provides multimedia education in introductory physics (mechanics) at different levels. In this case, the radius of curvature of the convex surface of the given lens is supplied or is determined otherwise. Formula used: The wavelength of light is … 667 1000 722 667 667 667 667 278 278 278 278 722 722 778 778 778 778 778 584 778 A central dark fringe can be located between the glass plate and a lens. Calculation: Theoretically, the focal length of a combination of two convex lenses is given by, 1 (L 1 B 5 E 1 B 6 F @ B 5 B 6 where, f1 and f2 are the focal lengths of two convex lenses and d is the distance between them. The 6 N weight is a number in newtons, so immediately you should know it’s a force, and the distance the spring stretches from its equilibrium position is the displacement, x . Performing the simulation: The … 8. /Widths[333 556 556 167 333 611 278 333 333 0 333 564 0 611 444 333 278 0 0 0 0 0 /Differences[1/dotaccent/fi/fl/fraction/hungarumlaut/Lslash/lslash/ogonek/ring 11/breve/minus 761.6 489.6 516.9 734 743.9 700.5 813 724.8 633.9 772.4 811.3 431.9 541.2 833 666.2 278 556 556 556 556 556 556 556 556 556 556 278 278 584 584 584 556 1015 667 667 /Subtype/Type1 Newton's ring experiment mainly contains following questions… Q.What are Newton’s Rings? What the . %PDF-1.4 /LastChar 255 At the point of contact the thickness of air film Plane Glass plate Fig 2 : Formation of Newton’s ring Microscope Glass plate Eye piece Source of monochromatic /Type/Font They should complete the calculation in the lab class itself and get the signature from the staff. Pulleys may be clamped to the edge of the disk at any desired position. 4. Consider light of wave length 'l' falls on the lens. Fig 5 : Newton’s rings Apparatus Newton’s Ring Fringes of Sodium light. Where λ is the wavelength and R is the radius of curvature of the lens. 4 0 obj 722 1000 722 667 667 667 667 389 389 389 389 722 722 778 778 778 778 778 570 778 380.8 380.8 380.8 979.2 979.2 410.9 514 416.3 421.4 508.8 453.8 482.6 468.9 563.7 544 516.8 380.8 386.2 380.8 544 516.8 707.2 516.8 516.8 435.2 489.6 979.2 489.6 489.6 Where, D m+p is the diameter of the (m+p) th dark ring and D m is the diameter of the m th dark ring. 722 722 667 333 278 333 581 500 333 500 556 444 556 444 333 500 556 278 333 556 278 /Subtype/Type1 In the figure: R is the radius of the circle. = 0.01 cm. and Ring Purpose: The purpose of this experiment is to experimentally find the rotational inertia of a ring and a disk and to verify that these values correspond to the calculated theoretical values. View Newton's ring.pdf from MATH 111 at Pandit Deendayal Petroleum University. /FontDescriptor 12 0 R Then 1 VSD = 9/10 MSD. 761.6 272 489.6] The diameters of the rings are measured. The experiment is performed when there is an air film between the plano-convex lens and the optically plane glass plate.The diametre of the m th and the (m+p) th dark rings are determined with the help of a travelling microscope. /LastChar 196 << 333 722 0 0 722 0 333 500 500 500 500 200 500 333 760 276 500 564 333 760 333 400 /FontDescriptor 18 0 R also, C = mass of the substance (M) / volume (V). (i) The Newton’s ring experiment can be also used to find the wavelength of a monochromatic light. >> = 0.1/10 cm. 722 722 722 722 722 611 556 500 500 500 500 500 500 722 444 444 444 444 444 278 278 In a Newton’s rings experiment the diameter of the 15 th ring was found to be 0.59 cm and that of the 5 th ring is 0.336 cm. 2] Sol: The given data are. 0 0 0 0 0 0 0 333 180 250 333 408 500 500 833 778 333 333 333 500 564 250 333 250 The main piece of apparatus for this experiment is a force table, that is, a horizontal disk with degree markings on it. /Name/F1 27 0 obj of Physics, SASTRA University,Thanjavur. 400 584 333 333 333 556 537 278 333 333 365 556 834 834 834 611 667 667 667 667 667 722 611 333 278 333 469 500 333 444 500 444 500 444 333 500 500 278 278 500 278 778 In case if they are not able to complete, they should get attestation from the staff in the record note book for the readings taken If you are using then it will be in seven colors. /BaseFont/NATTHG+CMMI12 By employing sodium light whose mean wavelength is 5893Å, R can be determined from Eqn. If the radius of curvature of the lens is 100 cm, find the wave length of the light. For air . 564 300 300 333 500 453 250 333 300 310 500 750 750 750 444 722 722 722 722 722 722 2) when we pull the plano-convex lens slightly upwards? 833.3 1444.4 1277.8 555.6 1111.1 1111.1 1111.1 1111.1 1111.1 944.4 1277.8 555.6 1000 << 400 570 300 300 333 556 540 250 333 300 330 500 750 750 750 500 722 722 722 722 722 761.6 679.6 652.8 734 707.2 761.6 707.2 761.6 0 0 707.2 571.2 544 544 816 816 272 /Subtype/Type1 3 0 obj PY2107 Newton’s Rings Experiment 5 _____ 2.2 To see how Newton’s Rings can be used to measure the wavelength of light, consider the geometry of Fig 2 (although the figure shown is that for a plano-convex lens, it is equally appropriate to our experiment). /Type/Font In my experiments I mostly used a 150uF capacitor bank charged up to several kVs. 22 0 obj �:t{D��09v���3����O��8��=�T���q�p�[&�t,���-�/Z:Q�=Vʞ�O~(}K���D���uY��hw�g��:�h�ҺC�{��Y�Fei 1). /Type/Font 10 0 obj Now, we need to find the least count of One MSD which is say 0.1 cm. Newton's rings is analysed as an interference pattern and we derive the equation relating the len's radius of curvature to the radii of the dark rings. 161/exclamdown/cent/sterling/currency/yen/brokenbar/section/dieresis/copyright/ordfeminine/guillemotleft/logicalnot/hyphen/registered/macron/degree/plusminus/twosuperior/threesuperior/acute/mu/paragraph/periodcentered/cedilla/onesuperior/ordmasculine/guillemotright/onequarter/onehalf/threequarters/questiondown/Agrave/Aacute/Acircumflex/Atilde/Adieresis/Aring/AE/Ccedilla/Egrave/Eacute/Ecircumflex/Edieresis/Igrave/Iacute/Icircumflex/Idieresis/Eth/Ntilde/Ograve/Oacute/Ocircumflex/Otilde/Odieresis/multiply/Oslash/Ugrave/Uacute/Ucircumflex/Udieresis/Yacute/Thorn/germandbls/agrave/aacute/acircumflex/atilde/adieresis/aring/ae/ccedilla/egrave/eacute/ecircumflex/edieresis/igrave/iacute/icircumflex/idieresis/eth/ntilde/ograve/oacute/ocircumflex/otilde/odieresis/divide/oslash/ugrave/uacute/ucircumflex/udieresis/yacute/thorn/ydieresis] 6 Theory: Definitions: An LCR circuit is an electrical circuit consisting of a resistor (R), an inductor (L), and a capacitor (C), connected in series or in parallel. I. If you are using then it will be in seven colors. EXPERIMENT No. endobj 2. Newtons Rings Calculations - Values Not Working Out I'm having trouble with a Newtons Rings experiment to determine the refractive index of water. 791.7 777.8] A.Alternate dark and bright rings formed due to presence of air film when plano convex lens is placed on glass plate is called newtons rings. 889 667 611 611 611 611 333 333 333 333 722 722 722 722 722 722 722 564 722 722 722 389 333 722 0 0 722 0 333 500 500 500 500 220 500 333 747 300 500 570 333 747 333 On the outer edges of Newton Ring patterns, the fringes are really close together, and much more uneven. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 458.3 458.3 416.7 416.7 /FontDescriptor 24 0 R Then least count = (1- 9/10) MSD. It worth mentioning here that you can do the same calculation for the dark rings, but you would use $\mu$, instead of $\mu - \cfrac12$. 19 0 obj endobj 589.1 483.8 427.7 555.4 505 556.5 425.2 527.8 579.5 613.4 636.6 272] (9) becomes = D2 n 2D m 4R(n m): (10) The radius of curvature, R is calculated by spherometer (see g.3) using following relation R= l2 6h + h 2: The main piece of apparatus for this experiment is a force table, that is, a horizontal disk with degree markings on it. 334 405.1 509.3 291.7 856.5 584.5 470.7 491.4 434.1 441.3 461.2 353.6 557.3 473.4 Introduction: I.1 The phenomenon of Newton’s rings is an illustration of the interference of light waves reflected from the opposite surfaces of a thin film of variable thickness. The relationship between the mass and the radii is described as . Newton’s Rings Experiment Aim: To determine the wavelength of monochromatic light (sodium light) using. Then the specific rotation of the sugar solution, from the formula is; S = 10θ / LC. Newton's rings is a phenomenon in which an interference pattern is created by the reflection of light between two surfaces; a spherical surface and an adjacent touching flat surface. >> Theory Theoretically, the rotational inertia, I, of a ring about its center of mass is given by: where M is the mass of the ring… EXPERIMENT: 4 Object: To find the wavelength of Sodium light by Newton’s ring. /LastChar 255 If the wavelength of sodium light is 589 nm, calculate the radius of curvature of the lens surface. Measure the distance by which the polygon fails to close, and convert the distance into newtons. The centre of the ring dark in Newton’s Rings experiment with reflected light is dark because at the point of contact the path difference is zero but one of the interfering ray is reflected so the effective path difference becomes λ/2 thus the condition of minimum intensity is created hence centre of ring … 25 0 obj Let the radius of curvature of the convex lens is R and the radius of ring is 'r'. After charging up the capacitor C to a certain voltage U 0, the capacitor will be discharged through a flat/spiral coil. 3 6 m m. If the radius of the planoconvex lens is … /LastChar 196 experiment, they should do the calculations neatly. It worth mentioning here that you can do the same calculation for the dark rings, but you would use $\mu$, instead of $\mu - \cfrac12$. 489.6 489.6 489.6 489.6 489.6 489.6 489.6 489.6 489.6 489.6 489.6 272 272 761.6 489.6 Diffraction Pattern Measurements using a Laser From Eq. Feel free to Subscribe and please do hit the thumbs up button ... Newton's Ring Experiment - Duration: 3:28. /BaseFont/PDPLMD+NimbusRomNo9L-Medi /Subtype/Type1 722 611 556 722 722 333 389 722 611 889 722 722 556 722 667 556 611 722 722 944 722 1111.1 1511.1 1111.1 1511.1 1111.1 1511.1 1055.6 944.4 472.2 833.3 833.3 833.3 833.3 556 333 1000 556 556 333 1000 667 333 1000 0 0 0 0 0 0 333 333 350 556 1000 333 1000 Newton’s Rings Experiment Aim: To determine the wavelength of monochromatic light (sodium light) using. In this experiment, we will measure the stopping potential with modern electronics. 5{bB*��k��_)r��T˷ +�h�����E�鄎 p7��O]ƿKGD����ƽt��k�F�8����fb���|XjB�J#峊�-,ia��!lw�'G��Xӱ�h������.�r�ي���$;�U��X�Tz�.������� bv�I���9�.�&6�G�a�v�#f�Y��S�s�R�L/)����X��f�ܳ7�j������� �����q�3�[ EN{0R}k��m�]E�C�V{���N�9=�����h�qS��~\Z�Z. 489.6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 611.8 816 278 278 500 556 500 500 500 500 500 570 500 556 556 556 556 500 556 500] /Name/F3 In the experiment obtaining newton's rings what changes in the rings happens when: 1) we use a biconvex lens instead of a plano-convex lens? ... Multi electron interference in double slit experiment. Stack Exchange Network. 8 2 m m and that the 1 0 t h ring 3. After refraction and reflection two rays 1 and 2 are obtained. At this page I want to present the Thomson Ring Experiment using a capacitor as energy source (Fig. EXPERIMENT: 4 Object: To find the wavelength of Sodium light by Newton’s ring. In this diffraction grating experiment you will observe a pattern of diffracted light. As shown in figure arrange the lens with glass plate. x��ko7��~��h���=�h����~Pd��U�:��4���A�C�ʛ�Cb[��{�3������l~o�����j� ~����������y�����j7��w��Ļ�뫛�PZ�/�����O [���GS� ��WR��J�?���w ��ko���q���շ ���Eq��l���H��m�P��,���p�VA��W�~#vItW"� ]�����V�/F[~�����"|����t'nz���:��e;��|Q C onsider a ring of radius ‘ r ‘ due to thickness ‘ t ‘ of air film as shown in the figure 6 given below: Fig 6. A convex lens is placed above a flat lens, which produces rings of light and dark fringes (bottom). 7 0 obj ring’s method, in which material of refractive index is immersed between plano-convex lens and glass plate. 699.9 556.4 477.4 454.9 312.5 377.9 623.4 489.6 272 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 The rotational inertia of a ring with consistent density is dependent of its mass and the inner and outer radius. /Length 1922 << Newton' s ring experiment demonstrates interference with a circular object. The central element of the apparatus is the photodiode tube. The errors and various causes in the experiment of measuring lens curvature diameter using Newton ring are analyzed and discued.The chief source of errors and fairly perfect and practical meth eds of treatment are presented. endobj endobj So, rotation produced by the sugar solution = X-Y = 15 0 [15 degrees is the difference, its interpretation is important.]. Next to each vector record its name (such as E), its magnitude in newtons, and its angle, as recorded on the data sheet. 722 722 667 611 778 722 278 500 667 556 833 722 778 667 778 722 667 611 722 667 944 /FirstChar 1 >> When viewed with monochromatic light, Newton's rings appear as a series of concentric, alternating bright and dark rings centered at the point … Newton's rings is analysed as an interference pattern and we derive the equation relating the len's radius of curvature to the radii of the dark rings. PY2107 Newton’s Rings Experiment 5 _____ 2.2 To see how Newton’s Rings can be used to measure the wavelength of light, consider the geometry of Fig 2 (although the figure shown is that for a plano-convex lens, it is equally appropriate to our experiment). 278 278 556 556 556 556 556 556 556 584 611 556 556 556 556 500 556 500] 0. Introduction: I.1 The phenomenon of Newton’s rings is an illustration of the interference of light waves reflected from the opposite surfaces of a thin film of variable thickness. The centre of the ring dark in Newton’s Rings experiment with reflected light is dark because at the point of contact the path difference is zero but one of the interfering ray is reflected so the effective path difference becomes λ/2 thus the condition of minimum intensity is created hence centre of ring … << Newton' s ring experiment demonstrates interference with a circular object. << It is named after Isaac Newton, who investigated the effect in his 1704 treatise Opticks. Example problem A series of rings formed in Newton's rings experiment with sodium light was viewed by reflection. 444 1000 500 500 333 1000 556 333 889 0 0 0 0 0 0 444 444 350 500 1000 333 980 389 734 761.6 666.2 761.6 720.6 544 707.2 734 734 1006 734 734 598.4 272 489.6 272 489.6 >> << 14/Zcaron/zcaron/caron/dotlessi/dotlessj/ff/ffi/ffl/notequal/infinity/lessequal/greaterequal/partialdiff/summation/product/pi/grave/quotesingle/space/exclam/quotedbl/numbersign/dollar/percent/ampersand/quoteright/parenleft/parenright/asterisk/plus/comma/hyphen/period/slash/zero/one/two/three/four/five/six/seven/eight/nine/colon/semicolon/less/equal/greater/question/at/A/B/C/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y/Z/bracketleft/backslash/bracketright/asciicircum/underscore/quoteleft/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z/braceleft/bar/braceright/asciitilde The errors and various causes in the experiment of measuring lens curvature diameter using Newton ring are analyzed and discued.The chief source of errors and fairly perfect and practical meth eds of treatment are presented. Then wavelength is calulated using equation. 0 0 0 0 0 0 0 333 191 278 278 355 556 556 889 667 222 333 333 389 584 278 333 278 Light, interference, thin films. stream 833 556 556 556 556 333 500 278 556 500 722 500 500 500 334 260 334 584 0 0 0 222 Light, interference, thin films. In my experiments I mostly used a 150uF capacitor bank charged up to several kVs. /FirstChar 1 500 500 500 500 333 389 278 500 500 722 500 500 444 480 200 480 541 0 0 0 333 500 Calculation of Wavelength: a. I. Ring like interference fringes are observed in the reflected light. As we know that in the newton's rings the central fringe is always dark in the reflected system, is there any method by which we can obtain the central fringe as bright in the reflected system? The two interfering Apparatus used: A Plano convex lens of large radius of curvature, optical arrangement for Newton’s rings, plane glass plate, sodium vapour lamp and traveling microscope. /Widths[333 500 500 167 333 556 222 333 333 0 333 584 0 611 500 333 278 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 606.7 816 748.3 679.6 728.7 811.3 765.8 571.2 7.7K views. /FontDescriptor 9 0 R �(�Ո���9�t��{!o~���h����q���,��1u��:Q7�c{�3��,�:c�ǧ�?�F�XD��C������צ��}U�x���Ѹ� 1000 1000 1055.6 1055.6 1055.6 777.8 666.7 666.7 450 450 450 450 777.8 777.8 0 0 THE PHOTODIODE AND ITS READOUT. 272 272 489.6 544 435.2 544 435.2 299.2 489.6 544 272 299.2 516.8 272 816 544 489.6 Theory Theoretically, the rotational inertia, I, of a ring about its center of mass is given by: where M is the mass of the ring… Let the radius of curvature of the convex lens is R and the radius of ring is 'r'. Apparatus required- Plano-convex lens, Sodium lamp, Travelling microscope, optical arrangement. 888.9 888.9 888.9 888.9 666.7 875 875 875 875 611.1 611.1 833.3 1111.1 472.2 555.6 The circuit forms a harmonic oscillator for current, and resonates in a similar way as an LC circuit. The area can be thought of as made up of a series of thin rings, where each ring is a mass increment dm of radius $$r$$ equidistant from the axis, as shown in part (b) of the figure. /BaseFont/RUFDUB+NimbusSanL-Regu The square of the diameter and hence Dn 2 and D 2 n+m are found out. O is the center of the circle. 1277.8 811.1 811.1 875 875 666.7 666.7 666.7 666.7 666.7 666.7 888.9 888.9 888.9 Formula used – The wavelength of light is given by the formula = 2 + −2 4 Where Dn+p – Diameter of (n+p)th ring. Apparatus used: A Plano convex lens of large radius of curvature, optical arrangement for Newton’s rings, plane glass plate, sodium vapour lamp and traveling microscope. AC is the diameter. /FirstChar 33 652.8 598 0 0 757.6 622.8 552.8 507.9 433.7 395.4 427.7 483.1 456.3 346.1 563.7 571.2 [June 2005, Set No. endobj /Subtype/Type1 /FontDescriptor 15 0 R In transmitted light the ring system is exactly complementary to the reflected ring system so that the centre spot is bright. 1444.4 555.6 1000 1444.4 472.2 472.2 527.8 527.8 527.8 527.8 666.7 666.7 1000 1000 /BaseFont/YJVCKF+CMR12 If the light is incident normally on the lens, r = 0 and near to point of contact is small; therefore near point of contact, Therefore ….2.21. Newton's ring experiment mainly contains following questions… Q.What are Newton’s Rings? Figure 2: Two microscope slides are stacked to form an 'air wedge', which produces dark and light fringes (top). endobj After charging up the capacitor C to a certain voltage U 0, the capacitor will be discharged through a flat/spiral coil. So the question tells you that F = 6 N and x = 0.3 m, meaning you can calculate the spring constant as follows: Strings, connected to a ring at the center of the disk, pass over the pulleys. Physclips provides multimedia education in introductory physics (mechanics) at different levels. View Newton's ring.pdf from MATH 111 at Pandit Deendayal Petroleum University. Ring like interference fringes are observed in the reflected light. After refraction and reflection two rays 1 and 2 are obtained. Newton' s ring experiment demonstrates interference with a circular object. 1 0 obj /Widths[333 556 556 167 333 667 278 333 333 0 333 570 0 667 444 333 278 0 0 0 0 0 =R2¡2tR+t2+r. Travelling Microscope 5. 278 500 500 500 500 500 500 500 500 500 500 278 278 564 564 564 444 921 722 667 667 Calculation of Wavelength: a. (3), as in the present experiment. Date of experiment: 16/03/2012 Date of report: 30/03/2012 Investigation of Interference Patterns and Newton’s Rings Experiment conducted by Sultan LeMarc. [June 2005, Set No. Formula used – The wavelength of light is given by the formula = 2 + −2 4 Where Dn+p – Diameter of (n+p)th ring. 2] Sol: The given data are. 0. In this experiment, we will measure the stopping potential with modern electronics. << These rays interfere each other producing alternate bright and dark rings. So, rotation produced by the sugar solution = X-Y = 15 0 [15 degrees is the difference, its interpretation is important.]. 722 722 722 556 500 444 444 444 444 444 444 667 444 444 444 444 444 278 278 278 278 /Widths[791.7 583.3 583.3 638.9 638.9 638.9 638.9 805.6 805.6 805.6 805.6 1277.8 Experiment 3. A disk is nothing but a ring with no inner radius so its inertia is simply a function of … /Name/F5 Calculation of the Susceptibility for FeCl3 Solution by Quinkes Method. %���� Then the specific rotation of the sugar solution, from the formula is; S = 10θ / LC. Strings, connected to a ring at the center of the disk, pass over the pulleys. Diameter of Newton’s 15 th ring … /Name/F2 147/quotedblleft/quotedblright/bullet/endash/emdash/tilde/trademark/scaron/guilsinglright/oe/Delta/lozenge/Ydieresis /Widths[272 489.6 816 489.6 816 761.6 272 380.8 380.8 489.6 761.6 272 326.4 272 489.6 A.Alternate dark and bright rings formed due to presence of air film when plano convex lens is placed on glass plate is called newtons rings. So the question tells you that F = 6 N and x = 0.3 m, meaning you can calculate the spring constant as follows: Circular interference formed between a lens and a glass plate with which the lens is in contact. At this page I want to present the Thomson Ring Experiment using a capacitor as energy source (Fig. I have to do an experiment to find out the radius of curvature of a lens using the Newtons ring method given that you know the wavelength of the monochromatic light used in the experiment. <> endobj Sodium lamp 2. Study Resources. 500 333 944 0 0 667 0 333 556 556 556 556 260 556 333 737 370 556 584 333 737 333 /Filter[/FlateDecode] They should complete the calculation in the lab class itself and get the signature from the staff. >> �����mR�l�$U�+b��~wX��h�\�!�8b-�;q@9V��Z�ٷ��&~�qw�q�0�J��@�#��9��1�=\�����l��>���'�p��8 ˬ[K�^#s���y��E]���v=Vh�*��R��KqX-�2�op�J�,G5c�!SN8�g8�P:vx�����|(tٻ�o�s��V���o��� and Ring Purpose: The purpose of this experiment is to experimentally find the rotational inertia of a ring and a disk and to verify that these values correspond to the calculated theoretical values. /Encoding 7 0 R /Encoding 7 0 R Say, 10 VSD = 9 MSD. Study Resources. 500 500 1000 500 500 333 1000 556 333 1000 0 0 0 0 0 0 500 500 350 500 1000 333 1000 /BaseFont/THRFZE+CMEX10 The diode has a window which allows light to enter, and the cathode is a clean metal surface. Hence, calculate the value of focal length for different distances using above formula. Newton's rings is a phenomenon in which an interference pattern is created by the reflection of light between two surfaces; a spherical surface and an adjacent touching flat surface. I have to do an experiment to find out the radius of curvature of a lens using the Newtons ring method given that you know the wavelength of the monochromatic light used in the experiment. /Type/Font 500 500 500 500 500 500 500 564 500 500 500 500 500 500 500 500] %PDF-1.2 From this the diameter of the ring is found out which is the difference between the readings on the left and right sides. Figure 8.3:Measure the diameter of the central ring (Dc) and the positions of the rings on the left hand (L1to LM) and right hand sides (R1to RM). /Name/F4 <> The diameter of the m th dark ring was found to be 0.28 cm and that of the (m + 10) th 0.68 cm. A central dark fringe can be located between the glass plate and a lens. /LastChar 196 Objective – To determine the wavelength of sodium light using Newton’s ring method. /BaseFont/ZVLRFE+NimbusRomNo9L-Regu 2t=. In a Newton’s rings experiment the diameter of the 15 th ring was found to be 0.59 cm and that of the 5 th ring is 0.336 cm. The two interfering 3.1 4‚ = b sinµ4 b = 4‚ sin µ4 ’ 4‚ µ4 since y 2D = tan µ4 ’ µ4 (3.4) where D is the detector - slit distance ’ 2 meters. 2. Experiment performed by Dept. <>/OutputIntents[<>] /Metadata 714 0 R>> Calculation of the Susceptibility for FeCl3 Solution by Quinkes Method. Physics with animations and video film clips. The diameters of the rings are measured. Diameter of Newton’s 15 th ring … 299.2 489.6 489.6 489.6 489.6 489.6 734 435.2 489.6 707.2 761.6 489.6 883.8 992.6 13 0 obj DE is the chord 1). Stack Exchange Network. If the light is incident normally on the lens, r = 0 and near to point of contact is small; therefore near point of contact, Therefore ….2.21. 278 500 500 500 500 500 500 500 500 500 500 333 333 570 570 570 500 930 722 667 722 At the point of contact the thickness of air film /Type/Encoding Figure 2 EXPERIMENT NO: INSTRUMENT NO.- NR_ DATE: TITLE: DETERMINATION OF THE RADIUS OF CURVATURE OF THE CONVEX SURFACE OF A LENS BY MEANS OF NEWTON’S RING APPARATUS 1. Apart from rounding and procedural errors, this force represents pulley friction. /Subtype/Type1 In a Newton's Ring experiment, the diameter of the 2 0 t h dark ring was found to be 5. If the wavelength of sodium light is 589 nm, calculate the radius of curvature of the lens surface. There is a central dark spot around which there are concentric dark fringes.The radius of the nth ring is given by. 128/Euro/integral/quotesinglbase/florin/quotedblbase/ellipsis/dagger/daggerdbl/circumflex/perthousand/Scaron/guilsinglleft/OE/Omega/radical/approxequal Under white light we get coloured fringes. <>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.44 841.68] /Contents 4 0 R/StructParents 0>> Figure 2: Two microscope slides are stacked to form an 'air wedge', which produces dark and light fringes (top). /Encoding 7 0 R also, C = mass of the substance (M) / volume (V). On the outer edges of Newton Ring patterns, the fringes are really close together, and much more uneven. Capacitor C to a certain voltage U 0, the fringes are really close,... Lens slightly upwards, in which material of refractive index of water and light fringes ( bottom ) figure R... 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