Light with an intensity of 1 kW/m² falls normally on a surface with an area of 1 cm² and is completely reflected. The force of the radiation on the surface is: A) 1.0 * 10^-⁴ N B) 3.3 * 10^-¹¹ N C) 1.7 * 10^-¹⁰ N D) 3.3 * 10^-¹⁰ N E) 6.7 * 10^-¹⁰ N

Question

Quizplus · Accepted Answer

The force due to radiation pressure is given by F = 2IA/c, where I is the intensity, A is the area, and c is the speed of light. For complete reflection, the factor is 2. Converting area to m² and using I = 1 kW/m², we find F = 6.7 × 10⁻¹⁰ N.

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