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International Letters of Chemistry, Physics and Astronomy
Volume 48
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On Alternative Methods of Determining Radius of Curvature Using Newton’s Rings Set up

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Abstract:

It well known that radius of curvature of a plano convex lens can be determined using Newton’s Rings set up making use of Interference by division of amplitude principle. The general method widely used involves measurement of diameter of several circular dark fringes. We propose two alternative methods involving different formulae. It is based on the fact that, the formation of bright and dark interference fringes is a measure of the thickness of the air film at that point. The methods use simpler geometry and the formulae are easier to derive. We present the experimental data. The results from the experiment are in agreement with results obtained through the general method.

Info:

Periodical:
International Letters of Chemistry, Physics and Astronomy (Volume 48)
Pages:
27-31
Citation:
K.H. Raveesha et al., "On Alternative Methods of Determining Radius of Curvature Using Newton’s Rings Set up", International Letters of Chemistry, Physics and Astronomy, Vol. 48, pp. 27-31, 2015
Online since:
March 2015
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References:

Ajoy Ghatak, 1991, Optics , Tata Mcgraw Hill publication, 3rd Edition, 13. 16.

Chattopadhyay, 2002, An advanced course in Practical Physics, Central Publication, 6th Edition, 227 ( Received 17 February 2015; accepted 24 February 2015 ).

Cited By:

[1] B. Tlili, C. Nouveau, G. Guillemot, A. Besnard, A. Barkaoui, "Investigation of the Effect of Residual Stress Gradient on the Wear Behavior of PVD Thin Films", Journal of Materials Engineering and Performance, Vol. 27, p. 457, 2018

DOI: https://doi.org/10.1007/s11665-018-3132-1