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###### A laser is used in eye surgery to weld a detached retina back into place. The wavelength of the laser beam is $514 \mathrm{nm}$ and the power is 1.5 W. During surgery, the laser beam is turned on for 0.050 s. During this time, how many photons are emitted by the laser?

A laser is used in eye surgery to weld a detached retina back into place. The wavelength of the laser beam is $514 \mathrm{nm}$ and the power is 1.5 W. During surgery, the laser beam is turned on for 0.050 s. During this time, how many photons are emitted by the laser?

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