# A particular laser consumes 200.0 Watts of electrical power and produces a stream of 1.34×1019 1050 nm photons per second. What is the percent efficiency of the laser in converting electrical power to light?

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A particular laser consumes 200.0 Watts of electrical power and produces a stream of 1.34×1019 1050 nm photons per second. What is the percent efficiency of the laser in converting electrical power to light?

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Step 1

Percent efficiency can be defined as the energy produced divided by the energy consumed multiplied by 100.

Step 2

Here, we have a laser which consumed 200.0 Watts of electrical power.

To produce 1.34 x 10^19 photon/second of wavelength = 1050 nm

We have to calculate first the power obtained by the photons

Then from the cons...

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