- #1
Brammo
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Homework Statement
Estimate how many photons of visible light (500 nm) are emitted by a 100 W Bulb.
The answer on the sheet says approximately 10[itex]^{20}[/itex] photons/second
However when I work it out I get a slightly different answer.
Homework Equations
I used that 1J=1W/s or E=P/t
Also Energy of one photon is E=hf so if you had lots of photons you would [itex]\Delta[/itex]E=nhf where n is the number of photons.
The Attempt at a Solution
I get 2.5[itex]\times[/itex]10[itex]^{20}[/itex] photons/second