When a Clean Surface of Potassium Metal Is Exposed to Blue

Multiple Choice

When a clean surface of potassium metal is exposed to blue light, electrons are emitted. If the intensity of the blue light is increased, which of the following will also increase?

A) the number of electrons ejected per second
B) the threshold frequency of the ejected electrons
C) the maximum kinetic energy of the ejected electrons
D) the time lag between the absorption of blue light and the start of emission of the electrons
E) none of these