Answer:
Explanation:
The summer season begins in the Northern Hemisphere on June 20 or 21, known as the summer solstice, when the axis of rotation is tilted a full 23.5° toward the sun. The incoming solar radiation strikes Earth directly at a perpendicular or 90° angle to the 23.5°N parallel of latitude. This 23.5°N parallel of latitude, which runs through Mexico, the Bahamas, Egypt, Saudi Arabia, India, and southern China, is known as the Tropic of Cancer. On the summer solstice, the Northern Hemisphere has the greatest number of daylight hours, whereas the Southern Hemisphere has the fewest. The angle of the sun above Earth's Northern Hemisphere is greatest on this day. Because Earth is tilted toward the sun to the maximum degree, the North Pole has 24 hours of daylight on June 20 or 21, whereas the South Pole (which is tilted away from the sun to the maximum degree) has 24 hours of darkness. After the passing of the summer solstice, the length of daylight in the Northern Hemisphere gradually decreases.
