1. Why should we not look directly at the sun during a solar eclipse?
Answers
Answer:
because it harm to our eyes
A total solar eclipse is one of the most awe-inspiring events in nature, but astronomers and ophthalmologists warn that looking at the sun without solar eclipse glasses or other protection can damage your eyes and cause permanent blindness.
Totality, the brief period when the moon completely covers the sun, is the only safe time to watch with the naked eye. Lasting from seconds to a maximum of 7.5 minutes, depending on circumstances, totality changes the daytime sky to deep twilight – but turn away as soon as the sun reappears because even the smallest sliver is dangerously bright.
Although people have a natural aversion to extremely bright light, the temptation to gaze at the sun during a solar eclipse can be overwhelming, leading to lapses of good judgement. The darkness that accompanies an eclipse can override the reflex to squint and avert sight, increasing the amount of intense light striking the retina and making eye damage more likely.
Because of its intensity, viewing even a small slice of the sun can be dangerous. The lens of the eye focuses and concentrates sunlight on the retina, scorching it and leading to solar retinopathy; because the retina has no pain receptors, you won’t be aware of the damage until it's too late. For the same reason, don’t watch an eclipse through unfiltered telescopes, binoculars or photographic lenses.