A Thin Sheet of Plastic (N = 1

question 42

Multiple Choice

A thin sheet of plastic (n = 1.60) is inserted between two panes of glass to reduce infrared (λ = 700 nm) losses. What thickness (in nm) is necessary to produce constructive interference in the reflected infrared radiation?

• A) 218
• B) 109
• C) 55
• D) 318
• E) 443

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