At Normal Incidence, the Minimum Thickness of a Soap Film

question 85

Multiple Choice

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.

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