The shortest architectural shadow in our area is () solar terms (geography)

North of the Tropic of Cancer and south of the Tropic of Cancer, the shadow in the sun at noon in summer is shorter, and the shadow in winter is longer. Among them, the shadow in the northern hemisphere is the shortest on June 23rd, the longest on June 5438+02.23, and the longest in the northern hemisphere. The general rule is that spring is shorter than winter, summer is shorter than spring, autumn is longer than summer, and winter is longer than autumn.

Between the Tropic of Cancer and the Tropic of Capricorn, the sun shines vertically twice a year (Tropic of Capricorn once a year, that is, Tropic of Capricorn 6.23, Tropic of Capricorn 12.23), so the shadow on the day when the sun shines vertically is the shortest (none). The general rule is that, from winter, with the rejuvenation of the northern hemisphere, the shadow begins to shorten (at this time, the shadow points to the north). Then the direct point of the sun continues to the north, and the shadow rarely becomes longer (at this time, the shadow points to the south) until it reaches the longest point of the shadow pointing to the south at 6.23, and then the direct point of the sun goes south again, and the shadow begins to shorten. After the second vertical exposure of the sun, there was no shadow. The sun continued to the south, and the shadow pointed to the north. It began to enter autumn, and the shadow became longer and longer until the shadow became the longest in winter (12.23).