On the winter solstice, from the autumnal equinox to noon, is this number long or short? Solve! ! !

This number will get longer and longer. ?

First, the reason analysis:

1 and autumnal equinox/vernal equinox are dividing lines. At the beginning of the autumnal equinox, the sun gradually moved to the southern hemisphere, away from the northern hemisphere, and the northern hemisphere began to get cold, with shorter days and longer nights. ?

2. From the autumnal equinox to the winter solstice, the direct point of the sun continued to move southward until the Tropic of Capricorn, the solar altitude angle became smaller, the solar altitude decreased at noon, and the length of the ground figure became longer.

Second, for example, if you hold a light source above your head, no matter which direction you look, the shadow is the shortest. If you move the light source in front of you, the shadow behind you will gradually become longer. Although the sun shines directly on the earth, the earth is irregular, so the shadow changes obviously.