The total electromagnetic power emitted by the sun is 3.8 × 1026 w. what is the radiation pressure on a totally absorbing satellite at the orbit of mercury, which has an orbital radius of 5.8 × 1010 m?

Explanation:

The intensity of the radiation at the location of the satellite is given by:

where

is the power of the emitted radiation

is the area over which the radiation is emitted (the surface of a sphere), with

being the radius of the orbit

Substituting,

Now we can find the pressure of radiation, that for a totally absorbing surface (such as the satellite) is:

where

is the speed of light. Substituting,

it is called kinetic energy

force tends to be low and long diustance masses are high