Physics Help Forum refraction

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 Nov 26th 2014, 04:09 AM #11 Junior Member   Join Date: Nov 2014 Posts: 16 The more waves, the more chances to "bounce" out of line? I can't think of any other way to put it...
 Nov 26th 2014, 08:29 AM #12 Senior Member   Join Date: May 2014 Location: Poole, UK Posts: 132 harve: I heard what sounds like a nice analogy for the motion of light in glass. Imagine you can walk along a pavement at 4mph, and liken that to light moving in a vacuum. It takes you an hour to walk four miles into town. Now think about walking along a crowded pavement. You still walk at 4mph, but you have to walk around people on the pavment, so it takes you more than an hour to walk four miles into town. And if you're a little old lady with short steps you're held up more than if you're a big guy with long strides. Think of the stride length as being related to wavelength.
Nov 27th 2014, 02:55 AM   #13
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 Originally Posted by Farsight walk around people
I suppose people are medium's molecules.Nice example,but I think it's not clarifies the case."Walk around" or deviate to defined direction?How is phase velocity related to deflection?

Last edited by harve; Dec 6th 2014 at 02:33 PM.

Apr 24th 2017, 01:06 AM   #14
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index

 Originally Posted by Jerromyjon Because they are different wavelengths.
Refractive index is a function of velocity in the medium.How is it related to deviation angle inside the medium?How is phase velocity related to refraction?

Last edited by harve; Apr 26th 2017 at 02:03 AM.

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