Photoelectrons are ejected when monochromatic light shines on a freshly-prepared (oxide-free) sodium surface.In order to obtain the maximum increase in the number of electrons ejected per second, the experimenter needs to:
A)increase the frequency of the light.
B)increase the intensity of the light.
C)increase the area illuminated by the light.
D)increase the frequency and intensity of the light, and also the area illuminated.
E)increase the intensity of the light and the area illuminated, but not the frequency.

Question

Quizplus · Accepted Answer

Increasing the intensity of the light and the area illuminated increases the number of photons hitting the surface, thus increasing the number of electrons ejected. Frequency affects the energy of the ejected electrons, not their number.

Photoelectrons Are Ejected When Monochromatic Light Shines on a Freshly-Prepared