Question

When the intensity of a light source in increased,
(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 1

When the intensity of a light source is increased, then the number of photons emitted by the source in unit time increases and the total energy of the photons emitted per unit time increases.

Explanation:

Intensity of light

• Intensity is equal to number of photons falling per unit area and time inversely proportional to energy per unit time and area.

           I=n E / A T

Here I is the intensity, n is the' photons in n number', E/T is the 'energy per unit time', A is the 'area of cross section'.

• If the intensity raised, the number of photons falling per unit area and time also raised.
• So, the number of photon emits the source that also raised.
• Then intensity is raised, which results the energy per unit time raised and the total energy of photon emitted per unit time also raised.

To learn more;

1. https://brainly.in/question/3801312
2. https://brainly.in/question/9255619