Question

Which of the following formula is correct for radiation pressure if light is obliquely incident on a partially reflecting surface?

• A. $P=\frac{I}{c}{\cos }^2\theta (1+r)$
• B. $P=\frac{I}{c}{\cos }^2\theta (1-r)$
• C. $P=\frac{I}{c}{\cos }^2\theta r$
• D. $P=\frac{I}{c}{\cos }^2\theta (r-1)$

Answer 1

The correct option is A $P=\frac{I}{c}{\cos }^2\theta (1+r)$

Radiation pressure if light is obliquely incident on a partially reflecting surface is given by -

$P=\frac{I}{c}{\cos }^2\theta (1+r)$

Hence, option $\left(A\right)$ is the correct answer.