Consider two diffraction gratings; one has 4000 lines per cm and the other one has 6000 lines per cm. Make a statement comparing the dispersion of the two gratings.
A) The 4000-line grating produces the greater dispersion.
B) The 6000-line grating produces the greater dispersion.
C) Both gratings produce the same dispersion, but the orders are sharper for the 4000-line grating.
D) Both gratings produce the same dispersion, but the orders are sharper for the 6000-line grating.

Question

Quizplus · Accepted Answer

Dispersion is directly proportional to the number of lines per unit length of the grating. Therefore, the 6000-line grating will produce greater dispersion than the 4000-line grating.

Consider Two Diffraction Gratings; One Has 4000 Lines Per Cm