- #1
Ashley1nOnly
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Homework Statement
It's in attachment
Homework Equations
E=hf. Where h= planks constant and f= frequency
The Attempt at a Solution
I know that the flux of a photon is (# of photons)/(sec m^2)
I don't know the number of photos but I do know the frequency and power.
E=(6.6261*10^(-34)) J•s * (100 MHz)=6.621*10^-32
Also
Wavelength*frequnecy=c
I know that it's traveling 4 light years away.
Wavelength*(100MHz)=4c
Wavelength=4c/(100MHz
What equation am I supposed to use and how do I find the number of photon and how big in diameter would the recover/detector have to be. I don't want the answer just help understanding the problem and what I'm doing wrong. Or am I on the right track
Thanks in advance
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