What is the speed of light through perspex a plastic with an

How much time does moon's light ray takes to reach earth?

what is the speed of light really really???

Why is the speed of light (186,000 miles per second) considered the maximum velocity at which anything can travel?

I read that if you travel at the speed of light you can go back or forwards in time...how is this possible, I'm finding it ha...

Which is faster,the speed of light or the speed of dark?

When do you think people will build spaceships capable of traveling at the speed of light? My personal guess is the year 249...

I have to do a project about sond and light waves and I need to know if a light wave is a transverse wave or a longitudinal w...

Can anything go faster than the speed of light?

I hear theres a newish theory that non of my teachers have heard of that during the big bang because of the breaking of of th...

I understand that refraction is the process of bending light but I don't understand how you would draw the process (in a diag...