How is the formula for calculating solar pressure derived?

IcedB · Oct 20, 2004

Can anyone explain how the following formula is derived:
Force (F) = 2(P x A)/c
P=power A= Area

Tide · Oct 20, 2004

It would appear that's just twice the momentum flux of radiation reflecting off of some area:

[tex]2 n \frac {h \nu}{c} A = 2 \frac {P A}{c}[/tex]

where n is the photon density. In other words, energy flux is the same as momentum flux divided by c.

How is the formula for calculating solar pressure derived?

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How is the formula for calculating solar pressure derived?

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