Photoelectric Effect

Front

What is the photoelectric effect?

Back

The phenomenon of emission of electrons from a metal surface when radiation of appropriate frequency is incident on it.

Front

What type of radiation is necessary for metals like zinc, cadmium, and magnesium to exhibit the photoelectric effect?

Back

Ultraviolet radiation is necessary for metals like zinc, cadmium, and magnesium.

Front

What type of radiation is sufficient for alkali metals to exhibit the photoelectric effect?

Back

Visible radiation is sufficient for alkali metals.

Front

Who discovered the photoelectric effect?

Back

Heinrich Hertz discovered the photoelectric effect in 1887.

Front

What is the threshold frequency in the context of the photoelectric effect?

Back

The minimum frequency of incident radiation required to eject electrons from a metal surface.

Front

How does the intensity of light affect the photoelectric effect?

Back

The intensity of light affects the number of electrons emitted but not their kinetic energy.