SO MANY THINGS THAT LIGHT YOU CAN'T SEE LIGHT WHEN IT'S DARK IN A VACUUM IF A PERSON SHINES A BEAM OF LIGHT STRAIGHT ACROSS YOUR EYES YOU WON'T SEE IT SLIGHTLY TECHNICAL SOME PHYSICISTS WILL DISAGREE WITH THIS BUT IT'S ODD THAT YOU CAN'T SEE THE BEAM OF LIGHT YOU CAN ONLY SEE WHAT IT HITS I FIND