1. Infrared Radiation
A Part of the Electromagnetic Spectrum
Presentation by JJ Pavao.
• Infrared Radiation of the
human body.
• Infrared Radiation on the Electromagnetic
Spectrum
2. What is Infrared(IR) Radiation?
99 Infrared radiation is a part of the
electromagnetic spectrum. It is an invisible
light source that, on the spectrum, comes
after microwaves, and comes before visible
light. Infrared radiation is broke up into
three parts; near, mid, and far-infrared.
Near-infrared refers to the infrared radiation
that is closest to visible light. Far-infrared
refers to the infrared radiation closest to
microwaves. Mid-infrared is between those
two. As shown in figure 1, the main source
• Figure 1; The scale represents the heat in the area. White being
of infrared radiation is through temperature
the hottest, blue being the coldest. or thermal radiation. The more heat there,
the more movement the atoms and
molecules have, and the more infrared
radiation is produced.
3. Wavelength of Infrared Radiation
Infrared Radiation is found after microwaves, and before visible light
on the Electromagnetic Spectrum. The wavelength of IR [Starting at
Far-Infrared to Near-Infrared] ranges from 750nm (Nanometers) to
1mm. (Millimeters) The frequency of IR [Starting at Far-Infrared to
Near-Infrared] ranges from 405THz (Terahertz) to 300GHz. (Gigahertz)
The energy of IR [Starting at Near-Infrared to Far-Infrared] ranges from
1.24meV (Mill electron volts) to 1.7eV. (Electron volts)
• The Infrared region on
the Electromagnetic • Infrared Radiation on the
Spectrum, showing Electromagnetic Spectrum.
locations of Near-
Infrared, Mid-Infrared,
and Far-Infrared.
4. Environmental Effects of IR Radiation
One type of environmental effects for IR radiation is one that is somewhat
widely known; the Greenhouse effect. The Greenhouse effect is caused by
gases such as water vapor in the atmosphere absorbing IR radiation. The IR
comes from material’s that have been heated up by the sun rays. Absorption
of IR heats the atmosphere to the temperatures we experience. Objects, the
surface, and bodies of water are heated by the visible light of the Sun. These
aspects emit IR radiation and gases like water vapor absorb them. Producing
heat. This is the Greenhouse effect.
• A picture giving an example of
how the Greenhouse effect works.
(Very well rays and Sun in the
photo.)
5. Dangers of Infrared Radiation
The dangers of Infrared Radiation are not really considered “dangers,” but
“warnings.” As the “dangers” are not extremely serious. But, they still can cause
harm. Prolonged exposure to high levels of IR will result in burns and overheating.
Sun burns are apart of these types of burns. There are laser pointers that use IR
Radiation. Very powerful IR laser pointers can cause damage to the eye. Also,
over years of up close exposure of high levels of IR radiation, increased incidences
of eye cataracts can occur.
• Two very powerful IR laser pointers. These are
the two types of laser pointers that can cause
some damage to the human eye.
6. Pieces of Technology Using IR
Infrared radiation is used for many pieces of technology. For both military and
civilian devices. For the military devices; target acquisition, night vision,
homing and tracking, and surveillance are the most used devices that use
infrared technology. Thermal efficiency analysis, short-ranged wireless
communication, remote temperature sensing, weather forecasting and
spectroscopy are some of the devices for civilian/non military use. Some
pieces of IR technology are used for research and development work. Infrared
Telescopes are a good example for this.
• A diagram of an infrared telescope and how it
functions and what it’s made up of.
7. Bibliography
• (Unknown), (Unknown). "Infrared." Wikipedia. Web. 16 Nov. 2012.
http://en.wikipedia.org/wiki/Infrared.
• (Unknown), (Unknown). "What Are The Dangers Of Infrared?." eHow. Web. 16 Nov. 2012.
http://www.ehow.com/info_8239296_dangers-infrared.html.
• (Unknown), (Unknown). "The Infrared." NASA. 27 Mar. 2007. Web. 18 Nov. 2012.
http://science.hq.nasa.gov/kids/imagers/ems/infrared.html.
• Park, Techno. "Use of Infrared Technology." Sulekha.com. 21 Feb. 2008. Web. 23 Nov. 2012.
http://rivr.sulekha.com/use-of-infrared-technology_331297_blog.
• (Unknown), (Unknown). Infrared Telescope. Blogspot. Web. 27 Nov. 2012.
http://1.bp.blogspot.com/_bb8eHBzOVX8/TGEQ6cigIXI/AAAAAAAAAPQ/FYNIPWuBQU8/s1
600/infrared+telescope.JPG .
• (Unknown), (Unknown). Infrared Laser Pointers. hacknmod.com. Web. 28 Nov. 2012.
http://hacknmod.com/wp-content/uploads/2008/08/lasers.jpg .
• (Unknown), (Unknown). Infrared Radiation of the Human Body. Cool Cosmos. Web. 28 Nov.
2012. http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ir_tutorial/images/irbody.jpg
.
• (Unknown), (Unknown). "What is Infrared?." Cool Cosmos. Web. 28 Nov. 2012.
http://coolcosmos.ipac.caltech.edu/cosmic_classroom/ir_tutorial/what_is_ir.html .
• (Unknown), (Unknown). Infrared Radiation Working With Heat. Gizmag. Web. 28 Nov. 2012.
http://images.gizmag.com/hero/infrared-photo.jpg .
