Think of cats or goats climbing a tree. They might have no energy and stay on the ground (lowest energy state). Or they might be excited and jump up to the top of the tree. If they get a big kick they might even fly out of the top of the tree (ionization). Every time they fall from a branch to the next, or to the ground, you get a photon emitted whose energy is the same as the difference in energy levels of the branches.
Thank you
Great Sir, Please make video on each pumping method separately.
Your ability to teach is great sir
Good teaching
i have a question when A atom is excited it will go to excited state but how it will come in the ground state of B???
Decay of energy or let's say spontaneous emisson
Or stimulated emission in case of external radiation is applied
during inelastic collision energy is not conserved sir but both atoms share energy please could you explain?
Sir please upload some more lecture on the other concepts in EP. Please sir.....ur videos r very very helpful.thank u so much sir.
ur lectures are super sir
Sir,your lectures are very helpful.Can you please upload some more videos on coherence
it is really helpful ,thank uuu so much Sir
do you know phunsuk wangdu
In Random Laser's what is pumping position and Threshold limit?
Sir after collision with atom why electron doesn't lose kinetic energy
Super👌👌👌👌👌sir thankss🙏🙏🙏😆
Sir what is optical pumping with flash tube
Crystal clear sir thanks!!
good to understand sir... thank u..
nice lecture sir and please upload video on He-Ne gas laser please sir
Sir please make a video on types of hologram
Super explain
is active medium similar to lasing medium??
Yes
Sir please explain what is ground state and exited state
Think of cats or goats climbing a tree. They might have no energy and stay on the ground (lowest energy state). Or they might be excited and jump up to the top of the tree. If they get a big kick they might even fly out of the top of the tree (ionization). Every time they fall from a branch to the next, or to the ground, you get a photon emitted whose energy is the same as the difference in energy levels of the branches.
Thanx sir
Thank you Sir ji
Thanks
keep going
Thanks a lot...
pata nhi ka padha rahe h
khatam kare pada hai bas
Perfect
vvv