Question - How is infrared radiation transmitted?

Answered by: Karen Morgan  |  Category: General  |  Last Updated: 26-06-2022  |  Views: 507  |  Total Questions: 14

IR radiation is one of the three ways heat is transferred from one place to another, the other two being convection and conduction. The sun gives off half of its total energy as IR, and much of the star's visible light is absorbed and re-emitted as IR, according to the University of Tennessee. The primary source of infrared radiation is heat or thermal radiation. This is the radiation produced by the motion of atoms and molecules in an object. When an object is not quite hot enough to radiate visible light, it will emit most of its energy in the infrared. For example, SILICON and GERMANIUM transmits infrared but is opaque to visible light. Other materials that allow infrared to pass through are Calcium and magnesium fluoride, Quartz, Potassium bromide, Sodium chloride, Zinc selenide and sulfide, to name a few. Infrared lamps emit electromagnetic radiation in the frequency range that gives off heat when absorbed by matter. The tissue temperature increase produced by infrared lamp radiation is directly proportional to the amount of radiation that penetrates the tissue. Uses of Infrared Technology Radiation One of the most common uses of infrared radiation is in heat-sensitive thermal imaging cameras. These can be used to study human and animal body heat patterns, but more often, they are used as night-vision cameras. Infrared is also widely used in astronomy.

https://hps.org/publicinformation/ate/q10677.html

The ICNIRP statement on the biological effects of infrared radiation (IR) indicates that thermal injury (heat) is the dominant risk. Skin cancer is not expected from exposure to IR. However, increased skin temperature can reduce DNA repair efficiency, and promote skin cancer that is initiated by other agents.

https://wtamu.edu/~cbaird/sq/2013/07/17/do-humans-give-off-radiation/

Yes, humans give off radiation. Humans give off mostly infrared radiation, which is electromagnetic radiation with a frequency lower than visible light. And because a temperature of exactly absolute zero is physically impossible, all objects give off thermal radiation.

https://www.quora.com/What-are-some-common-examples-of-infrared-light

Some examples of radiating infrared waves are burning charcoal, heat from an electric heater, fire or a radiator emitting warmth. Infrared radiation is a type of electromagnetic radiation that objects emit when they are hot but not quite hot enough to emit visible light. A hotter object emits more infrared radiation.

https://science.nasa.gov/ems/07_infraredwaves

Infrared waves have longer wavelengths than visible light and can pass through dense regions of gas and dust in space with less scattering and absorption. Thus, infrared energy can also reveal objects in the universe that cannot be seen in visible light using optical telescopes.

https://sciencing.com/negative-effects-infrared-waves-8592303.html

Infrared radiation has a longer wavelength and lower frequency than visible light. Too much exposure can damage your eyes and skin. On a global scale, trapped infrared radiation contributes to global warming.

https://weatherstreet.com/weatherquestions/What_is_infrared_radiation.htm

Infrared (IR) radiation is just as important to the Earth's weather and climate as sunlight is. This is because, for all of the sunlight that the Earth absorbs, an equal amount of IR radiation must travel from the Earth back to outer space. If this was not the case, there would be global warming or global cooling.

https://physics.stackexchange.com/questions/43389/what-common-materials-can-effectively-block-infrar

Aluminum foil will kill all IR, bot high range and low. Most plastics allow IR to pass through. Glass will bock low frequency IR (red hot), but allow the passage of high frequency (white hot) IR.

https://simple.wikipedia.org/wiki/Infrared

Infrared (IR) radiation is a type of electromagnetic radiation (a wave with electricity). The wave is longer than light which humans can see and shorter than microwaves. The word infrared means below red. It comes from the Latin word infra (meaning below) and the English word red. People sense infrared as heat.

https://socratic.org/questions/what-are-the-negative-effects-of-infrared-radiation

Eye damage The human eye is sensitive to all radiation, including infrared radiation. IR raises the internal temperature of the eye, virtually “baking” it. Prolonged IR exposure can lead cataracts, corneal ulcers, and retinal burns. Don't stare at the sun!

http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ask_astronomer/faq/radiation.shtml

Is infrared radiation dangerous? In general, no -- at least from naturally occurring physical processes. Any form of radiation -- including visible light or radio waves -- could potentially be dangerous if highly concentrated into a narrow beam (that is the principle of lasers) of very high power.

https://www.saunabar.com/blog/infrared-vs-red-light-therapy-whats-the-difference

Red light is visible and is most effective for use on the surface of the skin. Red light occupies the “long end” of the visible spectrum with wavelengths of 630nm-700nm. Infrared light is invisible and is effective for use on the surface of the skin as well as penetration of about 1. 5 inches into the body.

https://sciencing.com/infrared-light-effect-eyes-6142267.html

Infrared Light Effect on Eyes. All infrared, visible or ultraviolet electromagnetic radiation can cause injury to the eye in sufficient concentrations, but this is very rare. The infrared light needs to be extremely intense to cause harm. Infrared lamps and incandescent bulbs are not powerful enough to cause such harm.

https://sciencing.com/materials-absorb-infrared-rays-8044395.html

Darker colors absorb the visible wavelengths in sunlight, not IR rays. Therefore, the color of the material is unimportant in the ability of a material to absorb infrared light.

https://www.quora.com/How-does-infrared-affect-humans

Infrared Light can have many positive effects on humans, but it depends on the frequency of the pulsed infrared light. Extra hydration is necessary with exposure to infrared light, but unlike lasers, this type of non-invasive light will not harm you, unless you are dehydrated.