What Is the Minimum (Non-Zero) Thickness of a Benzene (N $\lambda$

question 20

Multiple Choice

What is the minimum (non-zero) thickness of a benzene (n = 1.501) thin film that will result in constructive interference when viewed at normal incidence and illuminated with orange light ( $\lambda$ _vacuum = 615 nm) ? A glass slide (n_g = 1.620) supports the thin film.

• A)51.0 nm
• B)306 nm
• C)204 nm
• D)102 nm
• E)76.0 nm

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