Infrared Definition and 226 Threads

How exactly is infrared associated with heat? Is it just that infrared waves are emmited out of our body and when they contact something they turn to heat rather then being reflected?

Firstly, this is NOT a homework question although it may sound like it. My question pertains to http://youtube.com/watch?v=H5NwRfMJgOQ". My question is this: Could an Infrared Laser (there are varying power output lasers of 2W - 20mW) SPIN a paper of say 25 grams as seen in the vid on the tip...

How does an infrared photon leading to heating?

if eyes were sensitive to infrared, what would happen? the environment would appear brighter/duller or we would be able to see farther than normal or sun would be invisible? What do you think?

I need a super cheap (under $30ish) infrared camera for detecting human body heat to confirm the presence of the person, i.e. it doesn't have to record exact temperatures or create clear images, but just record the presence of the person. No visible camera is needed, just infrared. Does anyone...

I recently did an experiment with the Crookes's Radiometer. The radiometer was first placed under a 100W 1600 lm bulb and then a 100 W 2360 lm bulb. Though they both emit the same energy, the radiometer spun about 30% faster under the 2360 lm. Why is this? I was thinking maybe this was...

I went into a dark room with a tv remote control. Then I waited a couple of minutes until my eyes adjusted to the dark. Then I pressed a button on the remote and I could see a very faint flickering brownish glow eminating from the IR LED. I'm assuming this was just a sub-harmonic frequency...

just need to know about infrared sources and the output of infrared detectors I think it's volts but not sure any links or info is welcome thanks rob

Is there a material that can effectively make a strong heat source undetectable by infrared, by covering it (the heat source)? A random question, I know - just curious.

I am required to design a labratory experiment to investigate how the output from a photocell depends on its distance from a point source of infrared radiation. wat procedure could i follow? how would i measure the output of the photocell? what other measuring instruments should i use?

Help! is a photo detector the same as photosensor? can they be specifically for infrared light? and what does point source mean?

Why does my schoolbook say that infrared radiation is the electromagentic radiation with most thermal effect? I thought that the more energetic a certain electromagnetic wave is, greater is her thermal effect. It seems to me that infrared radiation is the electromagentic radiation with most...

If the strong coupling goes to zero in the infrared... is there some scale at which it has the same value that the electromagnetic coupling? At this energy, a quark should attract another quark with about the same force it should attact an electron. Curious.

hello. i am university student and currently doing infrared static Earth sensor modelling. Here, i need some help in making my project. is there anyone who knows about modelling the static Earth sensor? it is really a great help if you can tell me all the steps in making the model..

i am a student in my high skool and i was planning of making a apparatus for my science fair which involves infrared technology for the physically disabled. I wanted to know whether it is possible me to make a infrared device to calculate distance of a body from the origin of infrared waves. i...

Hi, I am a third year product design student at the University of Wales Institute, Cardiff and am currently working on my research project. I was hoping that the some of you would be able to provide me with as much information as you could on Infrared Technology, such as its uses, how it...

I'm posting this here because I don't know the legitimacy of the topic and whether it qualifies for discussion in the other physics sections. Curious thing happened today that's got me wondering... I met someone who represented a company that apparently sells healing and therapeutic...

I have confidence that the moderators can correct my choice of forum if a mistake was committed. Although I do believe that this is the correct forum. I start this thread not because I know much about the Near Infrared (or NIR) spectrum but because I am of great need to know. Research in...

Recently I took an introductory course on Group Theory applied to chemistry, and learned about symmetry applied to molecular vibrations and how to detemine the detection of the vibrational nodes in IR and Raman Spectroscopy. My interest is to be able to use Infrared spectroscopy to...

Here in Ontario/Canada police started using helicopters equiped with infrared cameras to detect marijuana grown in residentiall homes. As you know growing good pot requires lots of light/heat, so for cops is quite easy to fly over residential homes and check which one has big IR...

At school we extracted limonene from orange peels and we had to make an IR spectroscopy for it but I don't see anywhere how we can know the product has a ring constitution... I see a lot of information about aromatic rings but nothing for an alkene ring... Can anybody help me?

my teacher said that all greenhouse gases is good at absorbing heat energy,but not solar energy. I think it was wrong because i think that solar energy should consist of heat energy and light energy. And also, for an example ,carbon dioxide is absorb infrared rays and then give out infrared...

Could a crystal radio use a lead sulfide or lead selenide antenna an pick up in the infrared?

Can a crystal types radio be made to work in infrared? With an antenna of lead sulfide or lead selenide perhaps?

What is the relationship of the nutrino to infrared?

I know there is an equation somewhere that tells the wavelength of light given off by an object at a certain heat. So does this work backwards as well? do you get maximum heating of an object if you heat it with that wavelength light? if so, then you could vary the wavelength as the heat in the...