Concept explainers
The minimum thickness of coating.
Answer to Problem 42P
Explanation of Solution
Given info:
Wavelength,
The refractive index,
Formula used:
Dark bands will occur when
The light rays are perpendicular to the plates, the extra path length equals
Where,
Calculation:
By using the formula,
For constructive interference
Due to a phase shift of
The transmitted light will be stronger in the wavelengths at the ends of the spectrum.
So, the lens would emphasize the red and violet wavelengths.
Conclusion: The required thickness is
Chapter 24 Solutions
Physics: Principles with Applications
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