Electromagnetic Waves - UCF Physics
Electromagnetic Waves - UCF Physics
Electromagnetic Waves - UCF Physics
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Wave Momentum and Radiation Pressure<br />
Momentum and energy of a wave<br />
are related by, p = U / c.<br />
Now, Force = d p /dt = (dU/dt)/c<br />
pressure (radiation) = Force / unit area<br />
P = (dU/dt) / (A c) = S / c<br />
∴<br />
Radiation Pressure ⇒<br />
P<br />
rad =<br />
S<br />
c
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