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Chemistry-photon question

Bchemist4life
in Homework Help

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Problem stumped me:

 

If a laser emits 1.3 times 10^-2 J of energy during a pulse, how many photons are emitted during the pulse?

 

E=hv

 

where h is plancks constant 6.626 times 10^-34 j-s

 

v would be the frequency.

 

From what I understand, the problem is giving me E, but I'm stuck on the rest.

 

Just need a clue on where to go from here.

Problem stumped me:

 

If a laser emits 1.3 times 10^-2 J of energy during a pulse, how many photons are emitted during the pulse?

 

E=hv

 

where h is plancks constant 6.626 times 10^-34 j-s

 

v would be the frequency.

 

From what I understand, the problem is giving me E, but I'm stuck on the rest.

 

Just need a clue on where to go from here.

 

E = hv gives you the energy per photon. So what would be the energy for n photons?

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