That's a good homework question isn't it.
radiation is simply the movement of heat energy
Many kinds of solar radiation. Infared is what sunburns you, but there are far more dangerous frequencies you can't see or feel. All a consequence of nuclear fussion.
Cause, meet effect.
Sun approximates a black body at ~6000K, radiating
with a power density of Hsun
• Total power emitted is 4πR2
, where the radius of the
= 6.96 ×10
• Power density at a distance D from sun if given by: