@@neutch1991 Thank you. I feel one wave length is the distance to the franhaufer line and that is 21cm for hydrogen. czcams.com/video/Hb8pvboJEYo/video.html
It has long time to decay, but we have lots of these HI clouds in the Galaxy. Therefore we could detect HI-21 cm emission line although the spontaneous decay is very long.
Okay this is way late and I’m not a physicist, but I would imagine that the parallel spin is axiomatically larger than the anti-parallel purely because energy values are additive. Pos + pos > pos + neg
Excellent simplistic explanation, keep up the GOOD work !
Beautiful explanation. Thank you so much!
So, in average, it took 10 million years to a hydrogen atom emmits a photon, with 21cm wavelength... Is that correct?
I think that's the idea.
Thank you so much! I've been looking for a clear explanation for my lay person's brain. :)
Does the hydrogen extend out 21 centimeters when excited? Is that what you say?
no. When the electron passes from up to down, it emits a photon with a wave length of 21 cm.
@@neutch1991 Thank you. I feel one wave length is the distance to the franhaufer line and that is 21cm for hydrogen. czcams.com/video/Hb8pvboJEYo/video.html
Really nice explanation!
This helps alot! Thank you!!
Thank you!
@ 4:32 So its probability is very, very, very small.
It has long time to decay, but we have lots of these HI clouds in the Galaxy. Therefore we could detect HI-21 cm emission line although the spontaneous decay is very long.
6:19 Nu is frequency of what?
could you explain how you got the energy diffenece?
Okay this is way late and I’m not a physicist, but I would imagine that the parallel spin is axiomatically larger than the anti-parallel purely because energy values are additive. Pos + pos > pos + neg