Question

A radiation of energy E falls normally on a perfectly reflecting surface. Find the change in momentum –

• A. E/c
• B. 2E/c
• C. Ec
• D. E/c²

Answer 1

Answer: (B)

2E/c

Answer 2

let p = E/c

∆p = – $\left( - \frac { E } { c } \right)$ =