Question

Why should will not directly look at the sun explain with a simple activity light travel in a straight path?

Answer 1

This is because the sun simply outputs more power than our eye is designed to handle, and exposing our eye to that kind of power can damage the retina. And in a nutshell, solar eclipses are dangerous because the sun can come out from behind the moon and "surprise you" before you have a chance to look away.

Answer 2

$take \: a \: magnifying \: glass \: and \: pass \: the \: sunlight \: through \: it \: on \: a \:a \: paper \: you \: will \: observe \: a \: hole \: in \: it \: \\ that \: will \: explain \: you \: everything$