Can marijuana be detected from air with an infrared camera?
138005
The answer is yes. They do it all the time in hawaii and other places. look it up on the internet. The thing is that the marijuana plant puts out a heat signature, so one marijuana plant in a field of other green things the police helicopter that was equpied with infrared could spot it. Its not very likely they will find it unless you live somewhere where the police do flybys alot. As for in your house, yeah your grow light will put off a heat signature also but the police arent gonna fly over and automatically come bustin down the door untill they know for sure, because anything puts out heat in your house. The washer, dryer, stove, your shower, and just lights. So they cant really tell anything in your house. Hope this helps
887110
No.   Federal Law prohibits states to legalize pot (and other substances)
802276
Alice,\n\nI was at a party nine days ago, when my friends all started smoking pot. I didn't give in to the peer pressure. I didn't smoke any. But I did stay and hang around with them, and I think I got a little "contact buzz" from the second hand smoke. I'm in the military and have a random drug test tomorrow. Will second hand smoke show up in pee tests?? Please help me.\n\nThank You\n\n \nDear Reader,\n\nAttention! It's past tomorrow, so you either passed or failed your drug test. But for future reference, second-hand marijuana smoke — buzz producing, or not — can leave traces of the chemical tetrahydrocannabinol (THC) in your urine for a day or so after breathing the smoke. Usually, the amount is not enough to make you test positive. Most drug tests have intentionally high standards to avoid false positive results due to incidental ingestion of second-hand smoke.\n\nHair testing (which is rarely done because the results are not as reliable as results from urine tests) can give information about someone's drug use over a longer time period, say a month or so, rather than just a few days (for most drugs), or a few weeks (with heavy marijuana smoking, for example).\n\nBy the way, in order for you to test positive for THC, the marijuana smoke would have to be so thick that it would irritate the eyes of smokers and passive smoke breathers alike. Avoiding smoke-filled cars, unventilated rooms, and other enclosed smoky spaces can help ensure that you can hang out while your friends toke and still be clean for bugle call in the morning.\n\nhttp://www.goaskalice.columbia.edu/1289.html
311737
infrared and ultraviolet!
1140012
It can.  It depends how much you're inhaling.  It is stored in the fat cells and can stay in the system enough to test positive MONTHS later, not just weeks as someone has already said.   There is actually a formula (probation and parole use) for the rate THC levels must drop to show someone is not using.
188925
lol if it had high THC in it then it will... Only pot plants can get you high...\n\nBut getting high isnt a good thing.. It kills your brian cells and makes you a mess after a long use time frame of it..
1016317
We can see some infrared wavelengths, but only faintly. If you've ever been in a photographic darkroom you'll know what I mean. Or switch on an electric bar heater in a dark room. He won't be completely invisible, but close to it.
202716
Technically they can't. Doctors can't just run a drug test on your urine or blood all willy nilly, unless you've been notified and agreed to the testing, there is no way they could tell. Unless you go in there all stoned. Thats about it.
478056
There are many different "organic vapor analyzers" on the commercial market.  The specifics of each depends on the detection mechanism used.\n\nSome systems use infra-red radiation, others use mass spectrometric techniques, some use photo-ionization, and still others use a small catalytic combustion chamber to determine the concentration of flammable organic vapors.\n\nCheck for more information at places like Lab Safety Supply, or other industrial safety product companies.
388412
Actually I was working on a cloaking device.  I never built a prototype though because the raw materials would have costed me $1000.  Plus, there are several different types of metal detectors and each one has to be fooled in a slightly different fashion.  If you really want to know, just buy a cheap metal detector and see if you can fool it.  I think it can be done.  If you find a way to bypass those blatently unconstitutional airport checkpoints you've got my full support.
832832
Techno Alan is wrong. The glass does absolutely nothing to shift the infrared to the visible spectrum.  What is does is absorb some of the visible light while allowing the near infrared to pass through.  Photographic film can be made to respond to the near infrared, meaning that just as some of the layers in the film get exposed by the red , green or blue, an IR film has a layer that is also sensitive to the near IR.  So all that the filter does is to supress the visible part of the scene relative to the near IR.\n\nMost digital cameras include a infrared and UV filter over the sensor.  The filter prevents near infared light from adding noise to the red pixels in the camera array, and at the same time prevents you from taking the IR picture.  The UV filtering prevents the "fogging" that can occur on bright days from UV background. It eliminates the need for the "skylight filter" that is frequently used in film photography to enhance contrast.\n\nNow to the original question - to see in the infrared you need to use a sensor that can detect infared light and then convert it to a visual image.  Night vision goggles use a layer of material that emits an electron when it absorbs a near infrared photon.  The eletrons are "multiplied" uisng a "microchannel plate".  The stream of electrons then strikes a phosphor screen, making a visible image.  \n\nAt longer infared wavelengths different detector materials are used.  The materials can be either photoconductive (absorbed light changes the conductivity of the material which can be electrically read out) of photovoltaic (absorbed light generates electric charges - electrons and hoels-  within the semiconductor marterial that are collected and read out).  (CCDs or CMOS sensors in digital cameras are photovoltaic imaging devices that are sensitive to visible light).  There are also "bolometer" thermal sensors that absorb infared light, generatyinga  small change temperature can be read out to form an image.
558522
youcan  use any infrared device or blutooth device if supported by your cell phone ora usb cable
1183865
Yes if the officer is trained in using it. No if it's for photo radar.
361042
If the drug screening uses a hair folicle test then yes. Second hand marijuana smoke can show up in a hair folicle approximately one month after exposure. However, since that particular screening is very expensive most employers use a urinalysis or blood test, in which case most people will pass the test.
435722
Yeah there is an amount it takes to set off the test, it's called a cutoff. The cutoff for marijuana is 50 nanograms per milliliters of piss. If it really was 9 to 1 how much piss you  used of hers, you'll be clear unless you smoke ALOT. No, they cannot detect the smallest amount of THC, they don't even test for THC. They test for metabolites that are a result of THC breaking down in your body. There is not a home test available that can detect an amount under that i already stated, that requires extensive urinalysis using a mass spectrometry machine, and they wouldn't show it as positive at levels that small, because it's possible to have that amount of those chemicals in your body without ever smoking, that's why we have cutoffs.
265023
yeah. go slow. be extra careful, and you should be fine. and for the first idiot who answered, it is very very different from driving drunk. the statistics that say that thousands of car crashes per year are because of marijuana arent true. the tests they use only determine if the driver had smoked marijuana in the last month. there is no way to tell if they are high on the spot, unless they admit it. which very few do.\n\npeace
713715
Because smoked marijuana contains a variety of combustion compounds, it can damage the lungs and possibly the immune system. Several health committees recommended the development of an inhalation device that delivers pure THC -- the active ingredient in marijuana -- to the lungs. Such a device has not yet been created.\n\nThere is some evidence -- but no scientifically valid studies -- that marijuana is useful in treating some forms of epilepsy and spasticity caused by multiple sclerosis.\n\nSome studies show that smoked marijuana is effective for some patients in relieving nausea caused by cancer and chemotherapy. \n\nThere is evidence that marijuana may improve the appetite and help patients gain weight. This could be lifesaving for AIDS patients who develop wasting , a severe weight-loss condition. \n\nSmoking marijuana is effective in lowering pressure inside the eyeballs of some patients with glaucoma. A word of caution, however: the drug also drops blood pressure, and this could compromise blood flow to the optic nerve and damage vision.