Question

what are different between radiation and insolation​

Answer 1

Solar radiation is all the radiant energy emitted by the sun.

Solar irradiance is the power per unit area received from the Sun in the form of electromagnetic radiation measured in space or at the Earth's surface.

Insolation is the total solar radiation that reaches the earth's surface. It is measured by the amount of solar energy received per square centimetre per minute.

Answer 2

l radiation is the shooting forth of anything from a point or surface like diverging rays of light as the radiation of heat while insolation

is the incident radiant energy emitted by the sun which reaches a unit area over a period of time typically measured over a horizontal area at the Earth's surface or at the top of Earth's atmosphere