DIY LED Grow Light Vero 18 (Economy light)

Dr.D81 said:
If the ir radiation and ir light are the same energy moving at the same wavelength that makes them the samething to the best of my knowledge.
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According to MC's logos or logic, only the radiation or otherwise heat takes place when it is absorbed.
 
AquariusPanta said:
Ok so people and things, such as plants or the sun, emit IR radiation or otherwise heat correct? This is necessary for thermal imaging to function yes?

So the sun sheds its light, spectrums such as UV-IR upon our world, and we in return collect that light and as we collect it (as photons?), it is transferred into heat yes? The heat that we absorb and carry is radiation or otherwise heat yes?
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It is not transfered to heat that is just how we perceive it. when we or anything emite ir we are giving of ir light or the ir imaging would not work.infrared_portrait_1.jpg
 
electromagnetic radiation

em_spectrum2.jpg
 
Dr.D81 said:
It is not transfered to heat that is just how we perceive it. when we or anything emite ir we are giving of ir light or the ir imaging would not work.View attachment 3278995
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I'm not really thinking photography when discussing IR but rather like the IR imaging they use for night time vision and stuff. Since IR light can't be seen by the human eye (most of it if not all), then it can only be seen through the heat that it produces.
 
hyroot said:
electromagnetic radiation

em_spectrum2.jpg
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Just to make sure you and I are on the same page Hyrootz, your saying that ALL light, visible or non-visible, carries with it photons and that when photons are absorbed by any physical matter, for our purposes only, then heat is either a.) transferred (weird to think) or b.) created ?
 
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AquariusPanta said:
I'm not really thinking photography when discussing IR but rather like the IR imaging they use for night time vision and stuff. Since IR light can't be seen by the human eye (most of it if not all), then it can only be seen through the heat that it produces.
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Same thing ran them both.
 
AquariusPanta said:
I'm not really thinking photography when discussing IR but rather like the IR imaging they use for night time vision and stuff. Since IR light can't be seen by the human eye (most of it if not all), then it can only be seen through the heat that it produces.
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Just because your eye does not see infrared photons does not mean that the CCD of a camera can not. Long story short, photons are not heat.
 
A example of this would be when the sun comes out and you warm up. When the sun dips down, it gets cooler out.

So while photons or light from the sun don't directly carry heat, they do somehow produce it when they touch physical matter.
 
AquariusPanta said:
A example of this would be when the sun comes out and you warm up. When the sun dips down, it gets cooler out.

So while photons or light from the sun don't directly carry heat, they do somehow produce it when they touch physical matter.
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Photons are little packets of energy. When things absorb energy, one of the things that can happen is that its temperature can increase. If the system does work, like photosynthesis in a plant, then some of that energy can be used for other things besides being wasted as thermal energy.
 
When an electron of an atom absorbs a photon, it changes goes up to a higher energy orbital.

When an electron falls to a lower energy orbital, it emits a photon with exactly the amount of energy released from the electron falling in state.

In other words, the absorbance/emittance of atoms can only happen at very specific amounts of energy, one for each possible difference of orbitals(possible places the electron can be in the atom)

Here are all the possible places an electron can be. It's the periodic table!

quantum_table1.gif

8aDOv.jpg
 
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When a material absorbs one wavelength and re-emits a higher wavelength, it's called fluorescence. Since the absorbed photon has more energy than the photon lost, the difference is heat, which is basically speeding up the atom itself.

This is how the yellow phosphor coating works. It absorbs the narrow band of blue and emits a wide band centered around amber.
 
mc130p said:
Photons are little packets of energy. When things absorb energy, one of the things that can happen is that its temperature can increase. If the system does work, like photosynthesis in a plant, then some of that energy can be used for other things besides being wasted as thermal energy.
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A very clear explanation of your understanding. I like it.
 
churchhaze said:
When an electron of an atom absorbs a photon, it changes goes up to a higher energy orbital.

When an electron falls to a lower energy orbital, it emits a photon with exactly the amount of energy released from the electron falling in state.

In other words, the absorbance/emittance of atoms can only happen at very specific amounts of energy, one for each possible difference of orbitals(possible places the electron can be in the atom)

Here are all the possible places an electron can be. It's the periodic table!

quantum_table1.gif

8aDOv.jpg
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BOOOO chemistry ;-)

I enjoy science but some of it is so ambiguous and unintuitive... I guess you gotta find the matching ends to different topics, such as light and physical matter, before you find the attraction
 
Just as an example, liquid nitrogen tanks at minus 300 are wrapped with a reflective sheet in a vacuum insulated annular space. The wrap is intended to reflect radiant energy of the nitrogen back into itself.
 
Dloomis514 said:
Just as an example, liquid nitrogen tanks at minus 300 are wrapped with a reflective sheet in a vacuum insulated annular space. The wrap is intended to reflect radiant energy of the nitrogen back into itself.
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Ok this example demonstrates that nitrogen emits radiant energy, just as humans and plants do?
 
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