Re: ¿Why one cannot push light but just in the norm al direction to the ray?

On Wed, 04 Mar 2009 09:48:40 EST, arithmeticae <djesusg@xxxxxxxxx>
wrote:

Thanks Ed, you have clearly understood my point,
but, all this leads to the issue on the flashlight's conservation-of-momentum.

My final is point is, suppose that the whole device instantaneously stops, then the flash light should continue its movement with an horizontal component.

Are there any experimental proofs of such very particular phenomena?

I mean, has someone proven that after the device stopped then the flash lights continue by moving with an horizontal component?

But conservation of momentum assumes no loss of energy, right?

I mean otherwise, consider the following experiment ...

A ball is thrown upward out of a moving car (a convertible). While the
ball is in the air, the car suddenly stops. Of course, the ball is
unaffected by the car's stopping, and keeps going, landing in front of
the car. Conservation of momentum? Of course not, but energy has been
lost -- the energy required to stop the car. Without taking that into
account, it's not a closed system.

quasi
.

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