A perfectly absorbing solid sphere with a known fixed density, hovers stationary above the sun.
Channel: Doubtnut
Date: 2020-02-20

A perfectly absorbing solid sphere with a known fixed density, hovers stationary above the sun. This is because the gravitational attraction of the sun is balanced by the pressure due to the sun�s light. Assume the sun is far enough away so that it closely approximates a point source of light. Find the radius of the sphere and prove that it is independent of the distance of the sphere from the Sun.