FACTUALLY YOU ARE ACCEPTING
I really hate it when people tell me what I accept
if I agree with something you say , I will let you know.
how's that?
allow me to pass this by you.
when the laser is set at a certain frequency and a photon
strikes a atom with that certain frequency , the atom becomes excited
( because of the momentum gained from the photon )
and the atom slows
( because of the momentum gained from the photon )
if that same atom is again struck by the laser at the same frequency the atom will not absorb a photon.
( because of the momentum gained from the photon )
the mass of a system increases for each photon absorbed
the energy of a system decreases for each photon emitted
the increase in mass and decrease in energy is proportional
to the mass and energy of the photon.
so in the laser cooling these are the results
so for each absorption the following occurs
1) momentum transfer.( the kinetic energy of the photon )
2) the atom slows due to the momentum transfer.
2) the atom gains the mass of the photon.
3) the atom slows due to its increase in mass.
4) the atom cools due to its lower frequency.
there are
( 2 ) items in the above list that slow the atom
in the desired direction.
when a atom emits a photon the following happens
1) the atom looses the energy of the photon.
2) there is a recoil in a random direction , but not in the desired direction.
there are
( 0 ) items in the above list that slow the atom
in the desired direction.
absorption Wins !!!
BTW: random direction is not the desired direction.
