When the intensity of a light source is increased

Options

A. the number of photons emitted by the source in unit time increases
B. the total energy of the photons emitted per unit time increases
C. more energetic photons are emitted
D. faster photons are emitted

Answer

A, B, D

Explanation

When the intensity of light source is increased, a large number of photons are emitted from the light source. Hence option (a) is correct . Due to increase in the number of photons, total energy of the photons emitted per unit time also increase . Hence option (b) is correct. Increase is the intesity of light increases only the number of photons, not the energy of the photons. Hence option (c) is incorrect. The speed of photon is not affected by the intensity of light. Hence option (d) is correct.