Helium-Neon Lasers

[@abdullahsaberS]

wow ! you have a really broad vocal range

[@TheCloneEngineer]

How do you get it into a metastable state in the first place? Do you do this by sending a photon prior to releasing the second photon to set off the chain reaction?

[@Mana381]

Good explanation. But crappy audio

[@professor7296]

you just read my mind

[@ashishjaiswal609]

Audio really bad

[@professor7296]

you are just confusing everyone.Please make some good video.I am just saying that you need to simplify it as much as you can.so,that even a novice can easily understand