The intensity of radiation reaching the earth from the sun is 1350 W/m2. The earth's radius is 6.4 × 106 m. How big a force does this radiation exert on the Earth (Assume it is all absorbed)
The Attempt at a Solution
That's my answer. Is that correct?
(The result in my material is 5.8x108 N)
And I want to ask one more question?
What is the difference between I or Sav and S in calculation?
If we say the Sun delivers about 10000 W/m2 of energy to the Earth's surface, so that is Sav, right?
Then they told me to calculate the total power.
I see a book solved by telling P=SavA and another book was Pav=SavA.
Which one was correct? Or was Pav the same as P?
Then is this one P=SA.