Physics
An optically plane surface reflects a beam of light

As a diffused beam in one direction
As parallel beams in all directions
As diffused beams in all directions
As a parallel beam in one direction

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Physics
It is dangerous to observe Solar eclipse with naked eyes because

Infrared radiations from sun burn our retina
Ultraviolet radiations from Sun burn our retina
All radiations from sun initiate chemical reactions in eyes
Cosmic rays reach eyes more during the eclipse

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