Re: [Phys-L] Why is light slower in glass?

[Bernard Cleyet <bernard@cleyet.org>]

The vid. clips are examples of why I very much dislike tube.  Slow and nearly always the cc’s are very poor, not written by the authors.  
Please when ever not too inconvenient write the point or park a video w/ adequate cc’s on a web page.  That’s the reason I had a friend create my site, --for parking.  
 
Regarding the reason, I understood from the maligned text, that most of the light (photons) interact w/ the Drude oscillators to be delayed on emission.  (Notice that I’ve mixed classical w/ “modern” physics.)  That’s why some light is super-luminal.  


bc in a hurry


On 2016, Jan 24, , at 12:04, Savinainen Antti <antti.savinainen@kuopio.fi> wrote:

> Hi,
>
> I was asked the question in the title some time ago. I answered that I really don't know (I suggested a possible explanation which turned out to be false). The student suggested a YouTube video by prof. Merrifield:
> <https://www.youtube.com/watch?v=CiHN0ZWE5bk>
>
> Here is another related video on refraction by prof. Moriarty: <https://www.youtube.com/watch?v=YW8KuMtVpug&feature=youtu.be>
>
> I found the explanations quite convincing. If you care to watch the videos (they are not long), I'd like to hear your take on the question. 
>
> Best wishes,
>
> Antti Savinainen, PhD
> Finland
> -- 
> ******************************************************************************************
> Viesti on tarkastettu roskapostinsuodatus- ja virustorjuntaohjelmistolla.
> Tarkastuksesta huolimatta noudata asianmukaista varovaisuutta liitetiedostoja avatessasi.
> ******************************************************************************************
>
>
>
>
> _______________________________________________
> Forum for Physics Educators
> Phys-l@www.phys-l.org
> http://www.phys-l.org/mailman/listinfo/phys-l