A laser pulse with wavelength 515 nm contains 4.40 mJ of energy. Question: How many photons...

Question

Question

A laser pulse with wavelength 515 nm contains 4.40 mJ of energy.

Question: How many photons are in the laser pulse?

Can someone please walk me through the steps? I have tried to solve this multiple times, but the 2 answers I thought were for sure it are

A: 2.21 x 10^22 photon

B: 4.40 Joules X (1 photon/3.860x10^-19 Joules)

They were both wrong.

Answer 1

Answer #1

Answer 2

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