Geography of senior high school: on the vertical section, day and night are not equal. Is it the vernal equinox in spring (autumn) or the solstice in summer (winter)? As shown below, how to judge?

1, the first picture is the vernal equinox or autumnal equinox, because the vernal equinox divides the world day and night equally. You can also look at the shaded parts in the picture. The north and south are symmetrical, so it is the spring (autumn) equinox.

The second photo is the solstice in winter. Because the shadow area in the northern hemisphere is large, the days in the northern hemisphere are short and the nights are long. Or you can see the polar night in the North Pole, or you can judge that it is the winter solstice.

The third photo is the summer solstice. Because contrary to the second picture, the night time in the northern hemisphere is shorter than that in the southern hemisphere, so the days in the northern hemisphere are long and the nights are short, so it is the summer solstice. Similarly, it can also be judged from the extreme days in the Arctic.