Light of a certain energy shines on a metal and causes electrons to be emitted.
based on the research of albert einstein, what change would most likely result in stopping the emission of electrons from this metal?
an increase in the intensity of the light
a decrease in the intensity of the light
the use of light that has a higher frequency
the use of light that has a lower frequency

Answer is: the use of light that has a lower frequency.

Albert Einstein (1879-1955) proposed that a beam of light is a collection of discrete wave packets (photons) with energy hν, where h is Planck constant and ν is frequency.

The photons have a characteristic energy proportional to the frequency of the light.

Minimum frequency or the threshold frequency is energy below which no photoelectrons are emitted.

Above the minimum frequency, energy depends on the frequency of the light, not on the intensity of the light.