- #1

stigg

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## Homework Statement

a group of atoms are confined in a point like volume in a laser based atom trap, the laser light causes each atom to emit 1.0 x 10^6 photons of wavelength 780 nm every second. the sensor has area of 1 cubic centimeter and measure the light intensity emanating from the trap to be 1.6 nW when placed 25 cm away from the trapped atoms. assuming each atom emits photons with equal probability in all directions, determine the number of trapped atoms.

## Homework Equations

## The Attempt at a Solution

i honestly don't know where to begin with this problem, any guidance would be greatly appreciated, thanks