Question SPM.1A.HL.TZ0.23

Monochromatic light is incident on a diffraction grating. The diffraction pattern from the diffraction grating is then formed on a screen.

Only the central maximum and the first-order maxima can be observed on the screen.

What change will allow the second-order maxima to be observed on the screen?

A.  Decrease the distance between the diffraction grating and the source of light

B.  Increase the distance between the diffraction grating and the screen

C.  Increase the wavelength of the monochromatic light

D.  Reduce the number of lines per unit length of the diffraction grating