Photoelectric Effect

Front

What is a particle of light called?

Back

Photon

Front

True or False: A photon is a particle of light.

Back

True

Front

What type of light causes the ejection of a greater number of electrons from a metal surface?

Back

Only high frequency light.

Front

What is the best description of 'threshold frequency'?

Back

The minimum frequency of a photon that will cause an electron to be emitted.

Front

What phenomenon is illustrated when light causes electrons to be emitted from a metal surface?

Back

Photoelectric effect.

Front

What is the relationship between frequency and energy of a photon?

Back

Higher frequency photons have more energy.

Front

What happens to the kinetic energy of emitted electrons as the frequency of light increases?

Back

The kinetic energy increases.

Front

What is the role of the work function in the photoelectric effect?

Back

It is the minimum energy needed to remove an electron from a metal surface.

Front

What is the equation that relates energy of a photon to its frequency?

Back

E = hf, where E is energy, h is Planck's constant, and f is frequency.

Front

What happens if the frequency of light is below the threshold frequency?

Back

No electrons are emitted, regardless of the intensity of light.