A plate is kept in front of a beam of photons. The plate reflects 40% of the incident photons and absorbs the remainder. If the plate absorbs energy at a rate `1200J^(-1)s`, find the net force acting on it.

Explanation

To solve the problem step by step, we will follow these steps:

### Step 1: Determine the energy absorbed by the plate
The plate absorbs 60% of the incident photons. Given that the plate absorbs energy at a rate of \(1200 \, \text{J/s}\), we can directly use this value as the energy absorbed per second.

### Step 2: Calculate the total incident energy
Since the plate absorbs 60% of the incident energy, we can find the total incident energy using the formula:
\[
...