> tadchem comcast.net> wrote in message
>
>   274bf328-54f9-40f6-be3b-4019e0d52...@59g2000hsb.googlegroups.com
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>> On Sep 19, 12:42 pm, dedanoe gmail.com> wrote:

>>> assume light travels from in.vacuum to in.glass and back again
>>> in.vacuum: its speed will deccelerate from c to v and agian accelerate
>>> from v to c.

>

>> Wrong.

>

>>> how do you explian the acceleration?

>

>> There is no acceleration.

>

>>> i mean does light
>>> behave like p-mobile with renewable energy or so?

>

>> Light travels at c in a vacuum.  That includes the vacuum between
>> atoms in matter.

>

>> Light traveling "through" an atom is absorbed, and then normally re-
>> emitted at exactly the same polarization, speed (c) and frequency,
>> with a slight time delay due to interactions with the electromagnetic
>> fields within the atom.

>

>> For details see any comprehensive text on Special Relativity.  Also
>> research "polarizability" and the dielectric constant, as colligative
>> properties of matter.

>

>> A good text on the theory of the complex refractive index may also be
>> helpful.

>

>> Tom Davidson
>> Richmond, VA

>
> For some people nothing is helpful :-)
>
> Dirk Vdm- Hide quoted text -
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