White Light Is Shone on a Very Thin Layer of Mica

question 34

Multiple Choice

White light is shone on a very thin layer of mica (n = 1.57) .When the mica layer is observed from the illuminated side,interference maxima for wavelengths of blue (480 nm) and yellow (560 nm) are observed.What is the thickness of the mica layer?

• A) 1.58 \(\mu\)m
• B) 0.79 \(\mu\)m
• C) 3.16 \(\mu\)m
• D) insufficient information is given.

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