Question

Which one of the following is TRUE in photoelectric emission?

Options

• Photoelectric current is directly proportional to the amplitude of light of a given frequency.

• The number of photoelectrons emitted is directly proportional to the intensity of light of a given frequency at moderate intensities.

• Above the threshold frequency, the maximum K.E. of photoelectrons is inversely proportional to the frequency of incident light.

• The threshold frequency depends upon the wavelength of incident light.

Answer 1

The number of photoelectrons emitted is directly proportional to the intensity of light of a given frequency at moderate intensities.