The force of sunlight The solar constant, the average energy per unit area from the Sun falling on the Earth, is 1.4 × 103 W/m2 .
(a) How does the total force of sunlight compare with the Sun's gravitational force on the Earth?
(b) Sufficiently small particles can be ejected from the solar system by the radiation pressure of sunlight. Assuming a specific gravity of 5, what is the radius of the largest particle that can be ejected?
