You create a vacuum in a lab, and then shine a light through it, and there is experimental proof that light travels through a vacuum. Alternatively, take the fact that light travels through space - if light could not travel through a vacuum, no light from the stars, the moon or the sun would ever reach our planet.
It takes one second for every 299,792 km (186,282 miles) it has to cover.
It doesn't. Nothing to travel through.
Light is not matter because it does not have mass and does not take up physical space like matter does. Light consists of electromagnetic waves that travel at high speeds through space.
The question is irrelevant, since sounds cannot be transmitted through space.
The light takes approximately 8 minutes and 20 seconds to travel through layer 3.
With present technology it only takes a few minute to reach 'space'. To travel elsewhere would depend on your destination.
A light year is a unit of space, not time. It is the distance light travels in a year. Eris is far less than a light year away.
Because electromagnetic radiation at all wavelengths travels through vacuum at the same speed.
102,900,000
8.31 minutes @ the speed of light.
this question makes no sense. Do u mean a 'lighyear'?