H2P-275

Inverse square law

H2 Physics · JC 1 · Medium · Inverse square law

A point source of light emits uniformly in all directions. At a distance of 4.0 m, the intensity is

5.0\times10^{-3}\,\text{W m}^{-2}

. At what distance from the source will the intensity be

2.0\times10^{-3}\,\text{W m}^{-2}

Loading problem…