- #1
dsfranca
- 23
- 0
Hi!
I was reading about the relationship between the surface area of Earth that reflects light and the one that radiates. As the whole Earth emits radiation, the area that would radiate is A=4[tex]\Pi[/tex]r2, where r is the radius of earth. But the weird part is that the textbook says that only one quarter ([tex]\Pi[/tex]r) of the Earth's surface reflects light. Why isn't it half of the surface? Afterall half of the surface is illuminated by day!
Am I missing something or is the textbook wrong, as he uses this information many times!
Thanks
I was reading about the relationship between the surface area of Earth that reflects light and the one that radiates. As the whole Earth emits radiation, the area that would radiate is A=4[tex]\Pi[/tex]r2, where r is the radius of earth. But the weird part is that the textbook says that only one quarter ([tex]\Pi[/tex]r) of the Earth's surface reflects light. Why isn't it half of the surface? Afterall half of the surface is illuminated by day!
Am I missing something or is the textbook wrong, as he uses this information many times!
Thanks