- #1
Physics2.0
- 8
- 0
Hi,
While experimenting with various LED's in LN2, I noticed some strange behaviour from my green LED's.
As expected all LED's (except the green one's) emitted light with a shorter wavelenth (for instance, my yellow led turned to red etc). However, my 2 (different manufacturer type LED) green LED's turned yellow'ish in liquid nitrogen. At first I thought this had to do with some property of the LED, but the second green LED showed the same shift (to a higher wavelength).
I've thought about this a lot, but I can't think of any reason why the green LED's don't turn blue'ish. Any suggestions how to tackle this (for me still unsolved) mistery?
Thanks in advance!
While experimenting with various LED's in LN2, I noticed some strange behaviour from my green LED's.
As expected all LED's (except the green one's) emitted light with a shorter wavelenth (for instance, my yellow led turned to red etc). However, my 2 (different manufacturer type LED) green LED's turned yellow'ish in liquid nitrogen. At first I thought this had to do with some property of the LED, but the second green LED showed the same shift (to a higher wavelength).
I've thought about this a lot, but I can't think of any reason why the green LED's don't turn blue'ish. Any suggestions how to tackle this (for me still unsolved) mistery?
Thanks in advance!