A Beam of Light That Consists of a Mixture of Red

question 21

Multiple Choice

A beam of light that consists of a mixture of red light ( $\lambda$ = 660 nm in vacuum) and violet light ( $\lambda$ = 410 nm in vacuum) falls on a grating that contains 1.0 × 10⁴ lines/cm. Find the angular separation between the first-order maxima of the two wavelengths if the experiment takes place in a vacuum.

• A)11°
• B)17°
• C)24°
• D)41°
• E)65°

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