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CGP EDU Academic Team
Published on: September 13, 2026
A thin transparent film with refractive index 1.4, is held on circular ring of radius 1.8 cm.
The fluid in the film evaporates such that transmission through the film at wavelength 560 nm goes to a minimum every 12 seconds. Assuming that the film is flat on its two sides, the rate of evaporation is
.
Text Solution
Verified by ExpertsThe correct answer is:
54
(54)
For a thin film interference, a fringe for transmission is formed. When
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