SoL and refractive index

  • #1
ok i've been wondering about this for awhile

when people say the speed of light slows down when going through an object (ie glass).

does the speed of light actually slow down to 2x10^8 m/s

or does the speed of light actually stay constant at 3x10^8, but the photons collide with the SiO molecules in the glass (or whatever), such that by the time the photons exit the glass, it will have taken 1.5x longer than another photon that totally bypassed the glass and travelled in a straight line


i hope that general question im asking is clear, thanks
 

Answers and Replies

  • #2
Integral
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In materials photons are adsorbed and reemitted, this causes the delay which we interpret as a lower speed of light.
 
  • #3
ahh right.
do you happen to know any websites that explain this?
this is beyong the scope of our syllabus
 

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