A Diffraction Grating That Has 4500 Lines/cm Is Illuminated by Light

question 55

Multiple Choice

A diffraction grating that has 4500 lines/cm is illuminated by light that has a single wavelength. If a second order maximum is observed at an angle of 42° with respect to the central maximum, what is the wavelength of this light?

• A)1500 nm
• B)370 nm
• C)930 nm
• D)1100 nm
• E)740 nm

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Definitions:

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