[LINK] Our wireless world...

[Richard Chirgwin]

Gordon Keith wrote:
> On Wed, 29 Nov 2006 12:54, Richard Chirgwin wrote:
>   
>> "Wavelength in body tissue is not the same as in air"? - I am not quite
>> sure what you mean - that the wavelength of the cellphone signal changes
>> as the signal passes into the body? Yes, the body interacts differently
>> with different frequencies, but a 1.8GHz passing through something is
>> surely 1.8GHz on the other side...
>>     
>
> 1.GHz is the frequency, not the wavelength. 
>
> The frequency doesn't change.
>
> Wavelength = velocity / frequency.
>
> The velocity of radio signals through the air is different to the velocity of 
> radio signals through the body, hence for the same frequency the wavelength 
> is different.
>
> Regards
> Gordon
>
>   
Ouch is the sound of the cluestick hitting the smartypants (me!). I 
really should have thought about that e-mail for ten seconds longer ...

RC