It is said one should avoid staring at Sun as it can damage the eyes, but it is also said that one should not come out in sun during eclipse as it emits dangerous rays. Is that true? If yes, why?
[Physics] Are dangerous rays emitted during Solar Eclipse
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Best Answer
There's certainly no problem being out in the Sun during an eclipse: There's nothing being emitted then that's not being emitted at other times. The danger is just that the relative darkness near totality may make it seem safe to look at the Sun, even when it's not. But as long as you don't look directly at the Sun, you're fine.
During the time when an eclipse is total, it is safe to look at it with the naked eye. But only during totality. Even when the eclipse is almost total -- a thin crescent or even just Bailey's beads or the diamond ring visible -- you can damage your eyes by looking at it. So if you're planning to view an eclipse, be sure you can identify totality before looking with the naked eye. Viewing with an experienced eclipse-watcher is a good idea if you can arrange it.
As Mr. Eclipse puts it