What is the mechanism of golden puncture?

This 17-hole bridge will present the spectacle of red light passing through the bridge hole in winter solstice. When the ancient people built the bridge, they mastered and applied the knowledge of astronomical geography. When the sunlight reaches the lowest point in the afternoon from winter to the day before yesterday, it will penetrate the whole of bridge opening, presenting a natural wonder of "red light piercing holes", which is also a clever pen of landscape designers.

Every year, there will be such spectacular scenery only in the days around winter, and the golden afterglow will illuminate all the 17 holes. You can only see such a scene for a few days in a year.

Extended data

The 17-hole bridge in the Summer Palace reproduces the golden light piercing the hole;

165438+1October 24th, the weather in Beijing was fine in early winter, and the 17-hole bridge of the Summer Palace reappeared the beautiful scenery of "golden light piercing holes", which attracted many tourists and photographers to watch and take pictures. From a distance, bridge opening was illuminated and resplendent.

The reporter found that compared with the same period last year, the elderly accounted for a larger proportion of the people who came to shoot "Golden Light Piercing the Hole", and their equipment was more professional and varied, which even young people could not understand. ?

A 70-year-old man has been standing by the stone railing, and the camera on the tripod has been motionless on the 17 bridge for an hour. There are always people who are curious to ask why it is always from this angle. The old man replied, "I'm taking a slow shot." The listener is a little ignorant. ?

The so-called shooting delay means that the old man chooses the same scene, records the process of "golden puncture" from appearance to disappearance with thousands of photos, and then plays it 24 times a second, showing the effect of "golden puncture" playing quickly from arrival to departure, just like what we saw on TV, a flower from germination to flowering, the effect of a few seconds.

Baidu Encyclopedia-Guang Jin Chuan Dong