Tangent rays will hit any part of the earth on any day at sunrise and at sunset.
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Tangent.
The tangent ray refers to either the northernmost or southernmost hemisphere where the vertical rays refers to direct sun. During the June 21 solstice, the latitude rays in the southern hemisphere would be 66.5 deg S (Antarctic Circle)
The tangent ray refers to either the northernmost or southernmost hemisphere where the vertical rays refers to direct sun. During the June 21 solstice, the latitude rays in the southern hemisphere would be 66.5 deg S (Antarctic Circle)
The latitude of the tangent rays in the Northern Hemisphere on June 21st is approximately 23.5 degrees north, which is known as the Tropic of Cancer. This is the northernmost point where the sun's rays are directly overhead during the summer solstice.
During the winter solstice the Sun's rays are tangent to the Arctic and Antarctic Circles. At this time the North Pole is facing away from the Sun, while the South Pole is facing into the Sun.
During a December solstice, the tangent rays of the sun are focused on the Tropic of Capricorn, which is located at approximately 23.5 degrees south latitude. This results in the southern hemisphere receiving more direct sunlight and experiencing its summer season, while the northern hemisphere receives indirect sunlight and experiences winter.
At the time of the equinoxes, the sun's rays would be nominally tangent to the Earth at the north and south poles. Those are 90 degrees north and south of the equator respectively. Also I think at either 23.5 degrees north or 23.5 degrees south at sunrise and sunset.
Secants are chords that go through a circle ONCE! Tangents are rays or segments with one point touching the border of a circle and nothing else.
This is a result of the tilt of the Earth's axis. This causes 3 different kinds of rays: tangent, oblique, and direct.
Nothing "happens". They meet, and the rays continue merrily along their ways, never to meet again!