Answer:
662 nm
Explanation:
given,
camera lens of n = 1.5
magnesium fluoride n = 1.38
thickness = 120 n m = 120 × 10⁻⁹m
thickness =
wave length = 120× 10⁻⁹ × 4 × 1.38
= 0.662 × 10⁻⁶ m
= 662 nm
hence, the wavelength is equal to 662 nm
what?
write it correctly I don't understand the question
E is the answer.
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