CBSE Class 10 Answered
Why we are advised not to look at the Sun directly but we can look directly during sunrise or sunset.
Asked by Somesh Meena | 03 Jan, 2014, 10:20: PM
Expert Answer
The sun's UV radiation damages the light receptors of the retina, so we should not look at the sun directly, but during sunrise and sunset the sunlight is coming at us horizontally rather than vertically. It has traveled many miles through the atmosphere to reach our eyes. All that atmosphere blocks a huge amount of the light before it gets to your eyes and gives the sun its red color. Therefore, the sunlight is very dim, and does little damage to our eyes. We should still avoid staring at the sun during sunset/sunrise though.
Answered by | 05 Jan, 2014, 09:47: PM
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