Ultraviolet light is shone on a piece of metal, and electrons are observed to be ejected from the metal. The UV lamp is now replaced by a lamp of the same intensity, but which produces photons having a longer wavelength. If the new photon energy is still sufficient to overcome the work function of the metal and eject electrons, what difference is observed in the number of electrons produced per unit time?
A) The same number are produced.
B) More are produced.
C) Fewer are produced.
D) Without knowing more about the wavelengths used, one cannot answer.

Question

Quizplus · Accepted Answer

The Answer of Ultraviolet light is shone on a piece of metal, and electrons are observed to be ejected from the metal. The UV lamp is now replaced by a lamp of the same intensity, but which produces photons having a longer wavelength. If the new photon energy is still sufficient to overcome the work function of the metal and eject electrons, what difference is observed in the number of electrons produced per unit time?
A) The same number are produced.
B) More are produced.
C) Fewer are produced.
D) Without knowing more about the wavelengths used, one cannot answer.

Ultraviolet Light Is Shone on a Piece of Metal, and Electrons