The longest solar term of midday sun shadow

Question 1:A

Question 2: D.

Test analysis:

Question 1: According to the shortest shadow, Beijing time is 12: 40, and the longitude o

The longest solar term of midday sun shadow

Question 1:A

Question 2: D.

Test analysis:

Question 1: According to the shortest shadow, Beijing time is 12: 40, and the longitude of this place can be calculated as110 e; According to the longest shadow at noon in a year, and the flagpole is as long as the pole shadow, we can know that it is the local winter solstice, and the height of the sun at noon on this day is 45, so we can calculate the latitude of the place as 2134'.

Question 2: According to the latitude and longitude, we can know that this place is located in the coastal area of China and Guangdong. According to the noon shadow is the longest in a year, it can be judged that this day is around 65438+February 22. Question 4: Only option D corresponds to the landscape around the winter solstice.

Comments: The key to solving this problem group is: (1) By observing and recording the Beijing time corresponding to the polar shadow, it can be used to help calculate the local longitude; (2) By recording the shortest length of the polar shadow, it can be used to help calculate local latitude; (3) According to the fact that the shadow is the longest at noon in a year and the flagpole is as long as the shadow of the pole, it is judged that the local solar term is the winter solstice, and the time is 65438+February 22nd.