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to give you an inflated idea
Here are some videos about negative temperature.//www.youtube.com/watch?v=jdjTYlReE-I
This video shows what makes laser different than other sources of light.
Quote from: hamdani yusuf on 19/08/2022 09:00:12This video shows what makes laser different than other sources of light.We already know.Why post the vid?
The source may well be different, but a photon is a photon.
I have equipment that counts them individually.
AFAIK.
Quote from: Bored chemist on 19/08/2022 10:26:50Quote from: hamdani yusuf on 19/08/2022 09:00:12This video shows what makes laser different than other sources of light.We already know.Why post the vid?It contradicts your statement.
The most distinctive feature of laser over the other light sources is coherence.
You can't really make holograms without coherent radiation. (Ok, technically, you can but it's doing things the hard way)And yet, Gabor invented and demonstrated holography without using a laser.https://en.wikipedia.org/wiki/Dennis_Gabor
Quote from: alancalverd on 21/08/2022 10:30:14I have equipment that counts them individually. How do you know that it does indeed count a single photon, not less nor more, and not counting something else?
Quote from: hamdani yusuf on 21/08/2022 03:31:06AFAIK.That is the essence of the problem with many of your posts.You just don't K very F because you fail to learn.Quote from: hamdani yusuf on 19/08/2022 23:45:06Quote from: Bored chemist on 19/08/2022 10:26:50Quote from: hamdani yusuf on 19/08/2022 09:00:12This video shows what makes laser different than other sources of light.We already know.Why post the vid?It contradicts your statement. Not as far as I can tell.Which bit is troubling you?
why focusing sunlight can't get higher temperature than surface of the sun.
Quote from: hamdani yusuf on 21/08/2022 03:27:36The most distinctive feature of laser over the other light sources is coherence.I take it you didn't understand this.Quote from: Bored chemist on 12/08/2022 17:30:03You can't really make holograms without coherent radiation. (Ok, technically, you can but it's doing things the hard way)And yet, Gabor invented and demonstrated holography without using a laser.https://en.wikipedia.org/wiki/Dennis_Gabor
Quote from: hamdani yusuf on 21/08/2022 12:30:26Quote from: alancalverd on 21/08/2022 10:30:14I have equipment that counts them individually. How do you know that it does indeed count a single photon, not less nor more, and not counting something else? Something to do with quantum mechanics, I guess. And the fact that the counting stops when I switch off the source.
Quote from: Bored chemist on 21/08/2022 18:57:01Quote from: hamdani yusuf on 21/08/2022 03:31:06AFAIK.That is the essence of the problem with many of your posts.You just don't K very F because you fail to learn.Quote from: hamdani yusuf on 19/08/2022 23:45:06Quote from: Bored chemist on 19/08/2022 10:26:50Quote from: hamdani yusuf on 19/08/2022 09:00:12This video shows what makes laser different than other sources of light.We already know.Why post the vid?It contradicts your statement. Not as far as I can tell.Which bit is troubling you?Quote from: hamdani yusuf on 21/08/2022 03:27:36why focusing sunlight can't get higher temperature than surface of the sun.Why focusing laser can?
Do you understand the difference between hard and impossible?