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I didn't say anything about the temperature you can get by focussing a laser or the sun.How did you come to the conclusion that the video contradicts what I said?
There's also nothing special about lasers for cooling.
Quote from: hamdani yusuf on 09/08/2022 23:20:14How to cool things using light other than laser?The same way that you would do it using a laser, but using a different light source.The fact that you ask this proves that you don't understand how laser cooling works.
How to cool things using light other than laser?
Does temperature of the detector affect the counter?
Quote from: Bored chemist on 22/08/2022 09:55:44I didn't say anything about the temperature you can get by focussing a laser or the sun.How did you come to the conclusion that the video contradicts what I said?Quote from: Bored chemist on 09/08/2022 16:09:52There's also nothing special about lasers for cooling.Quote from: Bored chemist on 10/08/2022 09:18:45Quote from: hamdani yusuf on 09/08/2022 23:20:14How to cool things using light other than laser?The same way that you would do it using a laser, but using a different light source.The fact that you ask this proves that you don't understand how laser cooling works.
Quote from: hamdani yusuf on 22/08/2022 06:11:25Does temperature of the detector affect the counter?Not much. Thermal noise is all at quite low energy compared with an x-ray photon.
Do you realise that heating is not the same as cooling?
Quote from: alancalverd on 22/08/2022 12:25:00Quote from: hamdani yusuf on 22/08/2022 06:11:25Does temperature of the detector affect the counter?Not much. Thermal noise is all at quite low energy compared with an x-ray photon.But the effect does exist.
Quote from: Bored chemist on 22/08/2022 12:36:09Do you realise that heating is not the same as cooling?Heating increases temperature, cooling decreases temperature.
So... you do understand that the heating effect you from from focussing sunlight is nothing to do with the "laser" cooling effect, don't you?
Several effects- all perfectly well explained and catalogued - exist.https://en.wikipedia.org/wiki/Shot_noisehttps://en.wikipedia.org/wiki/Johnson%E2%80%93Nyquist_noisehttps://en.wikipedia.org/wiki/Flicker_noiseSo what?
Quote from: Bored chemist on 23/08/2022 12:53:54So... you do understand that the heating effect you from from focussing sunlight is nothing to do with the "laser" cooling effect, don't you?You said that photon from laser is indistinguishable from other sources, wich make them equally good for cooling. The video shows that they are different.
It doesn't show that they are different in a relevant way, does it?
You could still use a non-laser light source for cooling. (I didn't say they were "good" for it, did I?. I said they were not good.You made that up. Why did you do that?)
The point I was making was that laser cooling has nothing to do with the negative electronic temperature in a laser.
Quote from: Bored chemist on 24/08/2022 08:49:52The point I was making was that laser cooling has nothing to do with the negative electronic temperature in a laser.Why is electronic temperature in a laser said to be negative?
What do you mean by relevant?
What makes them less good for cooling?
Quote from: hamdani yusuf on 25/08/2022 08:52:42Quote from: Bored chemist on 24/08/2022 08:49:52The point I was making was that laser cooling has nothing to do with the negative electronic temperature in a laser.Why is electronic temperature in a laser said to be negative?Because it is.There are more electrons in an upper state than in a lower one.This still has nothing to do with "laser cooling".
Quote from: hamdani yusuf on 25/08/2022 07:48:46What do you mean by relevant?I mean relevant.The differences between laser- and conventional- light are not relevant to the use of light to produce cooling.For example: You do not need a temperature inversion to produce cooling.You do not need coherence to produce cooling (and you do not need a laser to produce coherence anyway.)
Quote from: hamdani yusuf on 25/08/2022 07:48:46What makes them less good for cooling?Why not try to work this out for yourself?Or are you not going to do that, because it would require you to actually learn a bit of science?