Question

For oblique incidence of radiation on a surface, which component of force develops the radiation pressure?

• A. Along the surface
• B. Perpendicular to the surface
• C. Both
• D. None of these

Answer 1

The correct option is B Perpendicular to the surface

Radiation pressure is defined as average force (perpendicular to the surface) per unit area $i.e.$

$P=\frac{F_{\perp }}{A}$

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