A plane electromagnetic wave of intensity of `10 W//m^(2)` strikes a small mmirror of area `20 cm^(2)`, held perpendicular to the approcaching wave. The radiation froce on the mirror will be:

Explanation

To find the radiation force on a mirror when a plane electromagnetic wave strikes it, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Given Values**:
- Intensity of the electromagnetic wave, \( I = 10 \, \text{W/m}^2 \)
- Area of the mirror, \( A = 20 \, \text{cm}^2 = 20 \times 10^{-4} \, \text{m}^2 \) (since \( 1 \, \text{cm}^2 = 10^{-4} \, \text{m}^2 \))
- Speed of light, \( c = 3 \times 10^8 \, \text{m/s} \)
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