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arXiv · 1005.3590

Modified Newton's rings: II

T. Sai Chaitanya·Rajiv kumar·V. Sai Krishna·B Shankar Anandh·K. S. Umesh
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Abstract

In an earlier work (Shankar kumar Jha, A Vyas, O S K S Sastri, Rajkumar Jain & K S Umesh, 'Determination of wavelength of laser light using Modified Newton's rings setup', Physics Education, vol. 22, no.3, 195-202(2005)) reported by our group, a version of Newton's rings experiment called Modified Newton's rings was proposed. The present work is an extension of this work. Here, a general formula for wavelength has been derived, applicable for a plane of observation at any distance. A relation between the focal length and the radius curvature is also derived for a plano-convex lens which is essentially used as a concave mirror. Tracker, a video analysis software, freely downloadable from the net, is employed to analyze the fringes captured using a CCD camera. Two beams which give rise to interference fringes in conventional Newton's rings and in the present setup are clearly distinguished.

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T. Sai Chaitanya, Rajiv kumar, V. Sai Krishna, B Shankar Anandh, K. S. Umesh. 2010-05-20. Modified Newton's rings: II. https://arxiv.org/abs/1005.3590

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