All Problems

Thermal Radiation. Quantum Nature of Light.

Problem 5.265

A plane light wave of intensity \(I=0.70 \mathrm{~W} / \mathrm{cm}^{2}\) illuminates a sphere with ideal mirror surface. The radius of the sphere is \(R=5.0 \mathrm{~cm} .\) From the standpoint of the corpuscular theory find the force that light exerts on the sphere.

Reveal Answer
F=πR2I/c=0.18μNF=\pi R^{2} I / c=0.18 \mu \mathrm{N}