Awasome Does The Speed Of Light Slow Down In Glass Ideas. When waves travel from a rarer medium to a denser medium, velocity of the wave will decrease. Because light is also a wave.
At 0:50, the speed in glass is 0.67c or 2/3c. Its has been said that light slows down in glass, but some talk about phase velocity and group velocity. Web speed of light, common misconceptions and possible explanations.
