Simulate the different positions of the sun with a flashlight. When is the elevation angle of the sun maximum and when is the sun?

Summer solstice. Summer solstice is one of the 24 solar terms, which occurs on June 2 1 or 22 of the Gregorian calendar every year. Flashlights are used to simulate the different positions of the sun, and the elevation angle of the sun is the largest during the summer solstice. On the day of summer solstice, the sun moves to 90 degrees of the yellow meridian, and the position of the sun directly on the ground reaches the northernmost point of the year, almost directly on the Tropic of Cancer. At this time, the sunshine time is the longest in the northern hemisphere.