In designing a grating, the way to achieve a smaller angular spread from the maxima of each wavelength to the corresponding minima for two approximately equal wavelengths is to
A) make the slits closer together.
B) increase the number of slits.
C) look at larger-order maxima.
D) Hold it! More than one response is valid.

Question

Quizplus · Accepted Answer

Increasing the number of slits and looking at larger-order maxima both contribute to achieving a smaller angular spread from the maxima of each wavelength to the corresponding minima, thus improving the resolution of the grating.

In Designing a Grating, the Way to Achieve a Smaller