A Hair Is Placed at One Edge Between Two Flat

A hair is placed at one edge between two flat glass plates.When this arrangement is illuminated with yellow light of wavelength (λ = 600 nm) ,a total of 61 dark bands are counted starting at the point of contact between the plates.How thick is the hair? (1 nm = 10−⁹ m) Note that a dark band occurs where the plates contact.

A) 3.6 × 10−⁴ m
B) 1.8 × 10−⁴ m
C) 1.8 × 10−⁵ m
D) 3.6 × 10−⁵ m

Correct Answer:

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