Light of the same wavelength passes through two diffraction gratings. One grating has 4000 lines/cm, and the other one has 6000 lines/cm. Which grating will spread the light through a larger
Angle in the first-order pattern?

Question

Quizplus · Accepted Answer

The grating with more lines per centimeter (6000 lines/cm) will spread the light through a larger angle because the angle of diffraction is directly proportional to the number of lines per unit length.

Light of the Same Wavelength Passes Through Two Diffraction Gratings