At normal incidence, the minimum thickness of a soap film n = 1.33) that causes constructive interference when viewed by reflected light of wavelength 400 nm is
A) 225 nm.
B) 200 nm.
C) 100 nm.
D) 75 nm.
E) 570 nm.

Question

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The Answer of At normal incidence, the minimum thickness of a soap film n = 1.33) that causes constructive interference when viewed by reflected light of wavelength 400 nm is
A) 225 nm.
B) 200 nm.
C) 100 nm.
D) 75 nm.
E) 570 nm.

At Normal Incidence, the Minimum Thickness of a Soap Film