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.