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The intensity of sunlight at the Earths distance from the
Chapter 34, Problem 40(choose chapter or problem)
The intensity of sunlight at the Earths distance from the Sun is 1 370 W/m2. Assume the Earth absorbs all the sunlight incident upon it. (a) Find the total force the Sun exerts on the Earth due to radiation pressure. (b) Explain how this force compares with the Suns gravitational attraction.
Questions & Answers
QUESTION:
The intensity of sunlight at the Earths distance from the Sun is 1 370 W/m2. Assume the Earth absorbs all the sunlight incident upon it. (a) Find the total force the Sun exerts on the Earth due to radiation pressure. (b) Explain how this force compares with the Suns gravitational attraction.
ANSWER:Step 1 of 3
(a) we know that the radiation pressure exerted on a perfectly absorbing surface is given by
In order to evaluate the pressure, we use the following relation