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## Homework Statement

The duration of a laser pulse is 10^(-8) s. The uncertainty in its energy will be?

## Homework Equations

## \delta x \delta p=\frac{h}{2\pi}##

## The Attempt at a Solution

speed of laser beam=c, duration is given so distance can be calculated exactly-shouldn't that mean delta x=0, therefore delta p=infinite and so uncertainty in energy also infinite.

I'd appreciate some help, thank you