Question

If light intensity is known, how is non-reflecting momentum calculated?

Hint:

The momentum of non-reflecting light can be calculated using the energy flux divided by the speed of light.

Answer 1

Step 1: Understanding the formula.
The momentum \( p \) of light can be calculated using the energy flux \( U \) and the speed of light \( c \). The energy flux \( U \) is the energy transferred per unit area per unit time, and the speed of light is the constant \( c = 3 \times 10^8 \, \text{m/s} \).
Step 2: Formula derivation.
The relationship between momentum and energy flux is given by: \[ p = \frac{U}{c} \] This formula is used to find the momentum of non-reflecting light, where the energy flux \( U \) is divided by the speed of light \( c \).
Step 3: Conclusion.
Thus, the momentum \( p \) can be calculated using the above formula.