According to the photoelectric effect in order to release electrons from a solid,the light incident upon it must:
A) have a high intensity.
B) have a low intensity.
C) have a long wavelength.
D) have a short wavelength.
E) None of the above.

Question

Quizplus · Accepted Answer

According to the photoelectric effect, electrons can only be released from a solid surface if the light incident upon it has a sufficiently short wavelength (i.e. high frequency energy). Therefore, choice D, having a short wavelength, is the best answer.

According to the Photoelectric Effect in Order to Release Electrons