According to experiments concerned with the photoelectric effect,which of the following will increase the kinetic energy of an electron ejected from a metal surface?
1)increasing the wavelength of the light striking the surface
2)increasing the frequency of the light striking the surface
3)increasing the number of photons of light striking the surface
A) 1 only
B) 2 only
C) 3 only
D) 1 and 3
E) 1,2,and 3

Question

Quizplus · Accepted Answer

According to the photoelectric effect, the kinetic energy of an electron is determined by the frequency of the light striking the surface, not the wavelength or the number of photons. Increasing the frequency of the light will increase the kinetic energy of the ejected electron, while increasing the wavelength or number of photons will not have any significant effect on the kinetic energy. Therefore, choice 2 is the correct answer.

According to Experiments Concerned with the Photoelectric Effect,which of the Following