The speed of the escaping photoelectrons
A) increases with increasing wavelength of the incident light.
B) decreases with increasing wavelength of the incident light.
C) is independent of the wavelength of the incident light.
D) is directly proportional to the intensity of the incident light.
E) depends only on the intensity of the incident light.

Question

Quizplus · Accepted Answer

The speed of the escaping photoelectrons decreases with increasing wavelength of the incident light. This is because longer wavelength light has less energy per photon, so it cannot knock the electrons out with as much energy, resulting in slower speeds.

The Speed of the Escaping Photoelectrons