(c) Newton's rings are observed in reflected light of wavelength 5.9 x 10 cm. The diameter of the 10th dark ring is 0.4 cm. Find the radius of curvature of the lens.

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(a) What is meant by interference of light? Discuss the conditions for interference.
(b) Give a diagram showing clearly how coherent sources are produced in a biprism. Derive
the formula for the fringe width in the biprism experiment.
(c) Newton's rings are observed in reflected light of wavelength 5.9 x 10$ cm. The diameter
of the 10th dark ring is 0.4 cm. Find the radius of curvature of the lens.
Transcribed Image Text:(a) What is meant by interference of light? Discuss the conditions for interference. (b) Give a diagram showing clearly how coherent sources are produced in a biprism. Derive the formula for the fringe width in the biprism experiment. (c) Newton's rings are observed in reflected light of wavelength 5.9 x 10$ cm. The diameter of the 10th dark ring is 0.4 cm. Find the radius of curvature of the lens.
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