Light with an intensity of 1 kW/m² falls normally on a surface and is completely reflected. The radiation pressure is: A) 1 kPa B) 3 *10¹¹ Pa C) 1.7 * 10^-⁶ Pa D) 3.3*10^-⁶ Pa E) 6.7* 10^-⁶ Pa

Question

Quizplus · Accepted Answer

The radiation pressure for completely reflected light is given by P = 2I/c, where I is the intensity and c is the speed of light. Substituting I = 1 kW/m² and c = 3 x 10⁸ m/s, we get P = 6.7 x 10⁻⁶ Pa.

Light with an Intensity of 1 KW/m2 Falls Normally on a Surface

Light with an Intensity of 1 KW/m² Falls Normally on a Surface