Re: [Phys-l] (no subject)

[carmelo@pacific.net.sg]

How about can you move a mirror on the floor with the photons emitted  
from your torchlight? Let's not ignore friction which exists in the  
real world.
Radiometer is not massive too. :-)

Quoting Bernard Cleyet <bernardcleyet@redshift.com>:

> Now I'm puzzled.
>
> Photons have momentum, so I'd think the mirror would absorb some of   
> the momentum and result in a frequency shift on the photon.  Not   
> measurable because of the disparity in momenta.  OTOH, how about the  
>  radiometer?  The "real" one, not the fake ones that depend on a   
> little gas in the bulb.
>
> bc