Why is the shadow of leaves round during the solar eclipse?

Mottled tree shadows are actually shadows formed by sunlight-due to the principle of pinhole imaging, when sunlight passes through leaves, many circular images of the sun will be formed on the ground.

As the moon gradually covers the sun from right to left, the shadows of trees will also change, just like the moon, there will be a "round change." After the partial solar eclipse begins, the shadow of the tree will become more and more "slender" and crescent-shaped; In the stage of total solar eclipse, the shadow naturally disappears completely; Subsequently, the dentate shadow will reappear and gradually become "fat"; It was not until the last contact that the image of the sun became round again.

Extended data:

According to the relevant information of the day (date and time, food spots and food areas, etc.). ) released by the observatory, people can observe the daily food in their area.

The sun is a celestial body that emits extremely strong light. Therefore, when observing the solar eclipse, never watch it directly with the naked eye. Even during the partial solar eclipse, when the sunlight is only blocked by a curved part, don't look directly with the naked eye, or you will be stabbed by the strong sunlight.