Physics · Dawn of Modern Physics

When the intensity of incident light is doubled, it means the number of photons striking the surface per unit time is doubled. This results in a proportional increase in the number of photoelectrons emitted, assuming the frequency of the light is above the threshold frequency required to emit electrons. Therefore, the maximum number of emitted electrons becomes double. The other options suggest non-linear relationships or incorrect effects, which do not apply to the linear correlation between light intensity and the number of emitted electrons.

This is the correct answer. Doubling the intensity of the incident light increases the number of incident photons, which directly doubles the number of emitted photoelectrons.

Incorrect. The relationship between intensity and the number of emitted electrons is linear, not exponential. Doubling the intensity results in doubling, not multiplying by eight.

Incorrect. Doubling the intensity leads to a doubling of the number of emitted electrons, not a quadrupling.

Incorrect. Increasing the intensity of the incident light increases the number of emitted electrons, not decreases it.