A good mirror reflects 80% of light incident on it. Which of of the following is correct ?
(a) Energy of each reflected photon decreases by 20%
(b) Total no. of reflected photons decreases by 20% . Justify your answer.

Explanation

To solve the problem, we need to analyze the two statements given in the question regarding the behavior of light when it strikes a good mirror that reflects 80% of the incident light.

### Step-by-Step Solution:

1. **Understanding Reflection**:
A good mirror reflects 80% of the light incident on it. This means that if a certain number of photons strike the mirror, 80% of those photons will be reflected, and 20% will be absorbed by the mirror.

2. **Analyzing Statement (a)**:
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