Speed of light [ENDORSED]

[Caitlin Dillon 3G]

I know this may be a stupid question, but I am really behind in chemistry...Is the speed of light always 3.00 x 10^8 meters per second? Or just in a vacuum?

[Joshua Baysa 1J]

The speed of light is 3.00 *10^8 only within a vacuum. This speed changes in things like air and water, but I'm not sure how much of a change this brings out.

[Logan 3C]

The speed of light slows down through materials such as gas, water and glass because of both its wave and particle principles.

[Mirian_Garcia_2G]

I believe that the most important thing to remember is that c, the speed of light, is a constant value. Whenever c is used in a formula, always know that its value is 3.00x10^8 m/s. But, yes, 3.00x10^8 m/s is the speed of light in a vacuum.