Concept explainers
The thickness of the thinnest soap film.
Answer to Problem 7PP
Explanation of Solution
Given:
Refractive index of air is
Refractive index of soap film is
Formula used:
There will be a phase inversion in the light rays reflected from the interface between air and soap film because of
The equation for destructive interference to get a black stripe is given by,
Where,
Calculation:
For the thinnest film,
Substituting for
Substituting the numerical values in equation
Conclusion:
The thickness of the thinnest soap film at which the black stripe can be seen is
Chapter 19 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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