Consider two diffraction gratings; one has 3,000 lines per cm and the other one

ID: 2252521 • Letter: C

Question

Consider two diffraction gratings; one has 3,000 lines per cm and the other one has 5,000 lines per cm. Which one statement comparing the dispersion of the two gratings is correct?

A. The 3,000-line grating produces the greater dispersion.
B. The 5,000-line grating produces the greater dispersion.
C. Both gratings produce the same dispersion, but the orders are sharper for the 3,000-line grating.
D. Both gratings produce the same dispersion, but the orders are sharper for the 5,000-line grating.

Explanation / Answer

C. Both gratings produce the same dispersion, but the orders are sharper for the 3,000-line grating.

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Consider two diffraction gratings; one has 3,000 lines per cm and the other one

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