Question

why the cat's eyes glow in dark?
$why \: the \: cat \: eyes \: glow \: in \: dark$

Answer 1

A cat's eyes glow thanks to its tapetum lucidum. ... That light-reflecting surface, called the tapetum lucidum, helps animals see better in the dark. When light enters the eye, it's supposed to hit a photoreceptor that transmits the information to the brain. But sometimes the light doesn't hit the photoreceptor, so the tapetum lucidum acts as a mirror to bounce it back for a second chance.
I hope it helps.