If we look at sun during solar eclipes even for 16th part of second our retina may burn why??

Question

But it is not that harmful during normal days why??

Answer 1

Looking at the sun IS harmful during normal days. However, the effect is enhanced during an eclipse because it gets dark and your eyes adapt. You've almost certainly experienced this yourself in your own home. When you have lights on in the house and you walk into another room and switch the light on you don't notice any discomfort. However, if you've ever woken up in the middle of the night and blundered around in the dark for the lightswitch before turning on the light, you probably find the sudden bright light quite uncomfortable or even painful. Your pupils are dilated in the dark to help you see better.

During a total eclipse the same thing happens. The light is reduced, so your pupils dilate to compensate. But if you look at the eclipse itself, the lack of atmosphere on the Moon means the Sun comes back into view at full brightness in a fraction of a second, much too fast for your pupils to contract or for you to look away before the damage gets done.

Answer 2

You are starting with a wrong assumption.!
Looking directly at the sun is dangerous at any time. How long it takes for your eyes to sustain damage depends on many factors having to do with the intensity of the sun's radiation at any given time. Don't fool around with this!!!! Once you realize that damage has been done, it's too late!
The reason you hear so much about the danger of looking at the sun during an eclipse is simply due to the fact that at this time lots of people become interested in the sun and want to look. Every time there is an eclipse, thousands of people end up in Hospitals because they looked directly at the sun. The fact that lots of people also use Binoculars and other optical instruments only makes the cases more severe.
ONLY look at the sun with Equipment and filters specifically manufactured for the purpose. Using a material which merely darkens the sun to make it comfortable to look at is not enough!!!!
These homespun materials do nothing to stop the sun's Ultraviolet radiation which is just as harmful ( maybe even more) as the visual light, it just can't be seen.
Since UV radiation causes cancer of your skin, want to take a guess what it does to your unprotected eye??
You don't have to have a $1000.- Telescope to observe an eclipse, There is filter material made by a Company called "Baader Planetarium" which produces this material in sheets which you can cut with scissors and put in an old fashioned Embroidery Frame and make your own very safe solar filter for under $10.- Hardly worth risking your eyesight for.
Remember that optical instruments multiply the strength of solar radiation and therefore multiply the damage manyfold.
Everyone knows the old Boy Scout trick about starting a fire with a small magnifying glass.
Do you really want to use that trick on your eyeballs? It won't start a fire, but it will sure perform a very crude form of Laser Surgery.

Don't Mess with It !!!!!!!!!!!

Adolph

Answer 3

has there been report in the history of mankind that this has truely happened to someone? Im not saying this is fiction. the one who can save this planets existence is given the gift to be able to stare and look at the sun for several hours not suffering damage to the retina . the eye of the i is the one who can do so.

Answer 4

Hi Adolph,

It's not the UV, it's the infrared that does the damage. Ralph Chou, who is the world expert on this (consultant to NASA), told me this. The infrared actually COOKS the retina, killing the cells.