does light travel faster in air or outerspace?

Question

anonymous · Answer

Welcome to Open Study. :))
Yes, light travels faster in air or outerspace.
speed of light in air: $\Large 3*10^{8}~~m/s$

anonymous · Answer

Thank you.. I'm not understanding much.. How do I ask another question?

souvik · Answer

simple   !....you have to close this question and post a new one...

anonymous · Answer

outerspace

theeric · Answer

Light is fastest in a vacuum, like space! Materials slow it down. At the link souvik provided, I found this table: http://hyperphysics.phy-astr.gsu.edu/hbase/tables/indrf.html#c People have measured how slow the light travels through other objects. They use the "index of refraction," usually given the variable $n$, which is...$$n=\frac{\text{Speed of light in vacuum}}{\text{Speed of light in the material}}$$The speed in a vacuum is always faster! So the numerator is bigger. So larger numbers mean the light is slower in that material.

anonymous · Answer

yes light can travel outerspace

anonymous · Answer

Light travels the fastest in outer space because outer space is a vacuum. Air, light can travel in air to but it's not a complete vacuum. There are clouds, AIR, and other things in our sky that can slow down the speed of light. Objects include glass, water (that's not really an object but light can travel thru it), and clear plastic.