Weather forecast in Chengcheng County, Weinan City
The specific observation time is as follows
Initial loss torque
8 14 3 1
Eating time
9 2 1 55
Last contact moment
10 36 15
Observing the sun is very dangerous because it emits strong visible light, infrared light and ultraviolet light. Ultraviolet rays not only burn the skin, but also cause rapid damage to the retina of the eyes. As long as human eyes look directly at the sun for a few seconds, it may cause permanent damage or even blindness. If the sun is observed through a telescope without proper dimming equipment, the consequences will be even more unimaginable. Partial solar eclipse and annular solar eclipse can't be watched without special safety measures. In the partial eclipse stage of the total solar eclipse, even if the surface of the sun is covered by the moon for 99%, the photosphere formed by the new moon will still cause harm to the eyes. Don't try to observe the sun with the naked eye at any stage of partial or annular solar eclipse.
Here are some scientific observation methods for you:
Ink observation method (but this method is not recommended because of its low dimming rate and easy eye injury)
You can take a basin of water, add ink, and see the sun through the reflection of water.
Pinhole projection method
Make use of two boards, dig a small hole in one board, and let the sunlight pass through this small hole and project onto the other board.
telescope projection method
Don't shake your hands, or the shadow of the sun will run back and forth. Never look directly at the sun with a telescope. If you look at the sun directly with a telescope, you must use a filter.
note:
Never use the so-called "sun card" or "eclipse card" provided by informal institutions.