The warmth of equatorial regions and coldness of polar regions on Earth can be
Chapter 0, Problem 5(choose chapter or problem)
The warmth of equatorial regions and coldness of polar regions on Earth can be understood by considering light from a flashlight striking a surface. If it strikes perpendicularly, light energy is more concentrated as it covers a smaller area; if it strikes at an angle, the energy spreads over a larger area. So the energy per unit area is less. .. The arrows represent rays of light from the distant Sun incident upon Earth. Two areas of equal size are shown, Area A near the North Pole and Area B near the equator. Count the rays that reach each area, and explain why B is warmer than A.
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