A beam of light with wavelength 4320 A° is incident on a thin film of refractive index 1.5such that the angle of refraction is 50°. Find the smallest thickness of the thin film whichwill appear dark by reflection(a) 3.5x103 cm(b) 4.0x10 cm(c) 3.5x10 cm(d) 2.2x10 cm

For the film to appear dark in the reflected system, the given condition to be satisfied.

Answered: A beam of light with wavelength 4320 A°…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter38: Refraction And Images Formed By Refraction

Section: Chapter Questions

Problem 26PQ

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A beam of light with wavelength 4320 A° is incident on a thin film of refractive index 1.5 such that the angle of refraction is 50°. Find the smallest thickness of the thin film which will appear dark by reflection (a) 3.5x103 cm (b) 4.0x10 cm (c) 3.5x10 cm (d) 2.2x10 cm