The speed of light in a medium

[bubblewrap]

The speed of light changes according to the medium that its in and I don't understand why. Is it because each particles in the medium has a bit of gravitational forces so that the light doesn't travel in a straight line, or perhaps because of something else?

 

[DrClaude]

There is an FAQ on the subject: https://www.physicsforums.com/threads/do-photons-move-slower-in-a-solid-medium.511177/

 

[bubblewrap]

There is an FAQ on the subject: https://www.physicsforums.com/threads/do-photons-move-slower-in-a-solid-medium.511177/

Thanks I'll make sure I check the FAQs next time :)