A laser cannot emit more energy than is put into it. But in instances where stored energy can be released in a very short time, the laser
A)puts out more energy than is put into it.
B)has a greater power output than power input.
C)both of these
D)neither of these

Question

Quizplus · Accepted Answer

The key distinction is between energy and power. While a laser cannot emit more energy than is put into it (conservation of energy), it can release stored energy quickly, resulting in a high power output for a short time. Power is the rate of energy transfer, so a high power output over a short period doesn't violate energy conservation principles.

A Laser Cannot Emit More Energy Than Is Put into It