Measure wavelength of light used in newton''s ring experiment, Physics

Q. How shall you measure wavelength of light used in Newton's ring experiment? Derive the formula used. 

Measurement of Wavelength of Monochromatic Light using Newton’s Ring Methods:

Light from monochromatic extended light source is allowed to fall on a glass plate G inclined at angle of 45? to the incident beam and is reflected normally on to a convex lens L of very large radius of curvature placed on a plane glass plate P. As a result concentric alternate bright and dark fringes are formed in the air film between the lens and the glass plate. These fringes are observed by means of a microscope M focused on the air film and their diameters are measured.

Procedure: After obtaining a good contract ring pattern in field of view we have to follow the following steps in order to measure A.

1.    Move the microscope in horizontal direction to bring its crosswire at the centre of the microscope.

2.    Now, counting the rings by moving microscope in one side and set the cross: wire YY’ tangential to one of the rings and note down the reading of microscope.

3.    By moving the microscope towards centre of pattern note down the readings for alternation ring.

4.    Now repeat the same procedure on the other hand for the same number of rings while moving on other side.

5.    From these reading calculate the diameter of each ring.

Now choose a suitable value of m, find average value of D2n+m – D2n and calculate the value of ¥. Value of r i.e. radius of curvature of Plano convex lens can be calculate using speedometer. Same procedure is used for the measurement of reflective index of given liquid.

Posted Date: 7/12/2012 7:22:44 AM | Location : United States







Related Discussions:- Measure wavelength of light used in newton''s ring experiment, Assignment Help, Ask Question on Measure wavelength of light used in newton''s ring experiment, Get Answer, Expert's Help, Measure wavelength of light used in newton''s ring experiment Discussions

Write discussion on Measure wavelength of light used in newton''s ring experiment
Your posts are moderated
Related Questions
Q. It is possible to have motion in the absence of a force.  Yes it is True, in the absence of a force a body will continue moving in a straight line and at a constant velocity

With mans lust for the unknown in space exploration, what will happen to our planet by removing so much weight in the form of spacecraft that will never return and can the earth re

It is explained by Heisenberg's uncertainty principle, it is impossible to calculate simultaneously both the position and the momentum of the particle. Let x and p be the uncert

For each element the number of neutrons in the nucleus can vary. Isotopes :Nuclei of given element with different numbers of neutrons.If they are not radioactive they called

What are the characteristics of laser? Characteristics of LASER: The given are the properties of laser that differentiate this from ordinary light as: a. Monochromaticit

Magic Carpet (Moscow Phys-Tech) Once sitting in heavy traffic the Baron von Münchausen thinking of a new kind of "magic carpet" type aircraft. The top surface of the large flat

MATERIALS: The basic ingredients of a copper clad laminate are: FILLER RESIN COPPER FOIL FILLER: Fillers are incessant webs of materials like paper

A coil of inductance 100 mH and resistance 800Ω is connected in parallel with a variable capacitor across a 12V, 5kHz supply. Determine for the condition when the supply curre

The greatest and least magnitude of the resultant of two forces of constant magnitude are P & Q. Proof that when the forces act at an angle of 2 alpha, their resultant is of magnit

Second; s: The basic SI unit of time, explained as the period of time equal to the duration of 9 192 631 770 periods of the radiation equivalent to the transition among two hy