CMB energy

Boud Roukema boud w
Wto, 24 Lut 2004, 21:40:26 CET

On Tue, 24 Feb 2004, Jarek Rzepecki wrote:

> Well I think that the problem is closer to the question: Why photons
> getting out of potential well suffer from red-shift - where their energy
> go in that case? then to the Doppler...

When you throw a frictionless ball up in the air at initial vertical
velocity  v_0,  it starts off with kinetic energy  0.5 m v_0^2 .

So why does the ball lose (kinetic) energy as it goes up? Why does
0.5 m v^2 get smaller? Where does the energy go?


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