According to Einstein, increasing the brightness of a beam of light without changing its color will increase:
A) the frequency of the photons.
B) the energy of each photon.
C) the speed of the photons.
D) the number of photons.

Question

Quizplus · Accepted Answer

Increasing the brightness of light increases the number of photons, not their frequency, energy, or speed.

According to Einstein, Increasing the Brightness of a Beam of Light