Infrared radiation - Revision history

Jmdonev: 1 revision imported

2020-01-31T05:10:06Z

1 revision imported

← Older revision	Revision as of 05:10, 31 January 2020
(No difference)

Energy>Jmdonev at 22:07, 19 January 2020

2020-01-19T22:07:47Z

← Older revision		Revision as of 22:07, 19 January 2020
Line 1:		Line 1:
	[[Category:Done ~~2018~~-12-~~10]] [[Category: Rudi grade Ashley edit~~]]		[[Category:Done 2020-01-31]]
	[[File:Infrared_dog.jpg\|~~300px~~\|thumb\|Figure 1. A dog as seen in the infrared spectrum.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/0/0c/Infrared_dog.jpg</ref>]]		[[File:Infrared_dog.jpg\|350px\|thumb\|Figure 1. A dog as seen in the infrared spectrum.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/0/0c/Infrared_dog.jpg</ref>]]

	<onlyinclude>'''Infrared radiation''' (IR) is a type of [[radiant energy]], with longer [[wavelength]]s than the visible [[light]] humans can see, but shorter wavelengths than radio waves. Its range extends from fairly small wavelengths near the color red, 700x10<sup>-9</sup> [[meter\|m]], to nearly a millimeter, 3x10<sup>-4</sup> m.</onlyinclude><ref>CRISP, ''Electromagnetic waves'' [Online], Available: http://www.crisp.nus.edu.sg/~research/tutorial/em.htm</ref>		<onlyinclude>'''Infrared radiation''' (IR) is a type of [[radiant energy]], with longer [[wavelength]]s than the visible [[light]] humans can see, but shorter wavelengths than radio waves. Its range extends from fairly small wavelengths near the color red, 700x10<sup>-9</sup> [[meter\|m]], to nearly a millimeter, 3x10<sup>-4</sup> m.</onlyinclude><ref>CRISP, ''Electromagnetic waves'' [Online], Available: http://www.crisp.nus.edu.sg/~research/tutorial/em.htm</ref>

	==Effect of IR==		==Effect of IR==
	Even though infrared radiation cannot be seen by the human eye, it can definitely be felt. Infrared energy is felt as [[heat]] because it interacts with [[molecule]]s by exciting them, causing them to move faster which increases the internal [[temperature]] of the object absorbing the infrared energy. Although all wavelengths of radiant energy will heat surfaces that absorb them, infrared radiation is most common in daily life because of the "ordinary" objects that emit it as [[radiant heat]] (see [[blackbody radiation]] and [[Wien's Law]] for more information on this).<ref>Hyperphysics, ''Heat Radiation'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/stefan.html#c2</ref> For example, humans at a temperature of [[celsius\|37°C]]<ref name=yea>R. A. Hinrichs and M. Kleinbach, "Heat and Work," in ''Energy: Its Use and the Environment'', 4th ed. Toronto, Ont. Canada: Thomson Brooks/Cole, 2006, ch.4, sec.E, pp.111-114</ref> emit most of their radiant heat in the infrared range, as can be seen in Figure 1.		Even though infrared radiation cannot be seen by the human eye, it can definitely be felt. Infrared energy is felt as [[heat]] because it interacts with [[molecule]]s by exciting them, causing them to move faster which increases the internal [[temperature]] of the object absorbing the infrared energy. Although all wavelengths of radiant energy will heat surfaces that absorb them, infrared radiation is most common in daily life because of the "ordinary" objects that emit it as [[radiant heat]] (see [[blackbody radiation]] and [[Wiens Law\|Wien's Law]] for more information on this).<ref>Hyperphysics, ''Heat Radiation'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/stefan.html#c2</ref> For example, humans at a temperature of [[celsius\|37°C]]<ref name=yea>R. A. Hinrichs and M. Kleinbach, "Heat and Work," in ''Energy: Its Use and the Environment'', 4th ed. Toronto, Ont. Canada: Thomson Brooks/Cole, 2006, ch.4, sec.E, pp.111-114</ref> emit most of their radiant heat in the infrared range, as can be seen in Figure 1.

	[[File:co2gif.gif\|318px\|thumb\|Figure 2. Carbon dioxide is able to interact with infrared radiation, leading to an imbalance of radiation entering and leaving the atmosphere.<ref>PhET Simulations, ''Molecules and Light'' [Online], Available: https://phet.colorado.edu/en/simulation/molecules-and-light</ref>]]		[[File:co2gif.gif\|318px\|thumb\|Figure 2. Carbon dioxide is able to interact with infrared radiation, leading to an imbalance of radiation entering and leaving the atmosphere.<ref>PhET Simulations, ''Molecules and Light'' [Online], Available: https://phet.colorado.edu/en/simulation/molecules-and-light</ref>]]
Line 15:		Line 15:
	==Use of IR==		==Use of IR==

	[[File:Nightvision.jpg\|~~200px~~\|thumb\|Figure 3. Night vision transforms infrared radiation emitted by objects into visible light that can be seen by the human eye.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/5/52/Nightvision.jpg</ref>]]		[[File:Nightvision.jpg\|360px\|thumb\|Figure 3. Night vision transforms infrared radiation emitted by objects into visible light that can be seen by the human eye.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/5/52/Nightvision.jpg</ref>]]

	Infrared radiation has many applications, some being:		Infrared radiation has many applications, some being:

Jmdonev: 1 revision imported

2019-01-04T18:15:23Z

1 revision imported

← Older revision	Revision as of 18:15, 4 January 2019
(No difference)

2dev>Jmdonev at 16:10, 17 December 2018

2018-12-17T16:10:04Z

← Older revision		Revision as of 16:10, 17 December 2018
Line 1:		Line 1:
	[[Category:Done ~~2015~~-09-06]]		[[Category:Done 2018-12-10]] [[Category: Rudi grade Ashley edit]]
	[[File:Infrared_dog.jpg\|300px\|thumb\|Figure 1. A dog as seen in the infrared spectrum.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/0/0c/Infrared_dog.jpg</ref>]]		[[File:Infrared_dog.jpg\|300px\|thumb\|Figure 1. A dog as seen in the infrared spectrum.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/0/0c/Infrared_dog.jpg</ref>]]

Line 5:		Line 5:

	==Effect of IR==		==Effect of IR==
	Even though infrared radiation cannot be seen, it can definitely be felt. Infrared energy is felt as [[heat]] because it interacts with [[molecule]]s by exciting them, causing them to move ~~around more~~ which increases internal [[temperature]] of the object absorbing it. Although all wavelengths of radiant energy will heat surfaces that absorb them, infrared radiation is most common in ~~our~~ daily ~~lives~~ because of the "ordinary" objects that emit it as [[radiant heat]] (see [[blackbody radiation]] and [[Wien's Law]] for more information on this).<ref>Hyperphysics, ''Heat Radiation'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/stefan.html#c2</ref> For example, humans at a temperature of [[celsius\|37°C]]<ref name=yea>R. A. Hinrichs and M. Kleinbach, "Heat and Work," in ''Energy: Its Use and the Environment'', 4th ed. Toronto, Ont. Canada: Thomson Brooks/Cole, 2006, ch.4, sec.E, pp.111-114</ref> emit most of their radiant heat in the infrared range, as can be seen in Figure 1.		Even though infrared radiation cannot be seen by the human eye, it can definitely be felt. Infrared energy is felt as [[heat]] because it interacts with [[molecule]]s by exciting them, causing them to move faster which increases the internal [[temperature]] of the object absorbing the infrared energy. Although all wavelengths of radiant energy will heat surfaces that absorb them, infrared radiation is most common in daily life because of the "ordinary" objects that emit it as [[radiant heat]] (see [[blackbody radiation]] and [[Wien's Law]] for more information on this).<ref>Hyperphysics, ''Heat Radiation'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/stefan.html#c2</ref> For example, humans at a temperature of [[celsius\|37°C]]<ref name=yea>R. A. Hinrichs and M. Kleinbach, "Heat and Work," in ''Energy: Its Use and the Environment'', 4th ed. Toronto, Ont. Canada: Thomson Brooks/Cole, 2006, ch.4, sec.E, pp.111-114</ref> emit most of their radiant heat in the infrared range, as can be seen in Figure 1.

	[[File:co2gif.gif\|318px\|thumb\|Figure 2. Carbon dioxide is able to interact with infrared radiation, leading to an imbalance of radiation entering and leaving the atmosphere.<ref>PhET Simulations, ''Molecules and Light'' [Online], Available: https://phet.colorado.edu/en/simulation/molecules-and-light</ref>]]		[[File:co2gif.gif\|318px\|thumb\|Figure 2. Carbon dioxide is able to interact with infrared radiation, leading to an imbalance of radiation entering and leaving the atmosphere.<ref>PhET Simulations, ''Molecules and Light'' [Online], Available: https://phet.colorado.edu/en/simulation/molecules-and-light</ref>]]

	Around 50% of the [[solar energy to the Earth\|Sun's energy to the Earth]] is in the form of infrared,<ref>Passive heating and cooling manual, ''Introduction to Solar Energy'' [Document], Available: http://www.azsolarcenter.com/design/documents/passive.DOC</ref> therefore the balance of this radiation in ~~our~~ [[atmosphere]] is crucial to keep a stable [[temperature of the Earth\|temperature]] and [[climate]]. [[Carbon dioxide]] in the atmosphere produces a [[greenhouse effect]], because CO<sub>2</sub> is able to absorb and re-emit infrared radiation as seen in Figure 2, unlike the gasses that make up most of the atmosphere ([[molecular oxygen]], O<sub>2</sub> about 21% and nitrogen, N<sub>2</sub>, about 78%).<ref name=UCAR>UCAR, ''Carbon Dioxide Absorbs and Re-emits Infrared Radiation'' [Online], Available: http://scied.ucar.edu/carbon-dioxide-absorbs-and-re-emits-infrared-radiation</ref> This greenhouse effect is [[temperature of the Earth without the greenhouse effect\|necessary]] for the livable temperatures on Earth, however an increasing level of [[greenhouse gases]] is contributing to an unstable [[global warming\|warming of the Earth]] which is a cause for great concern. Read more about this imbalance [[Earth's energy budget#Earth's Energy Imbalance\|here]].		Around 50% of the [[solar energy to the Earth\|Sun's energy to the Earth]] is in the form of infrared,<ref>Passive heating and cooling manual, ''Introduction to Solar Energy'' [Document], Available: http://www.azsolarcenter.com/design/documents/passive.DOC</ref> therefore the balance of this radiation in the [[atmosphere]] is crucial to keep a stable [[temperature of the Earth\|temperature]] and [[climate]]. [[Carbon dioxide]] in the atmosphere produces a [[greenhouse effect]], because CO<sub>2</sub> is able to absorb and re-emit infrared radiation as seen in Figure 2, unlike the gasses that make up most of the atmosphere ([[molecular oxygen]], O<sub>2</sub> about 21% and nitrogen, N<sub>2</sub>, about 78%).<ref name=UCAR>UCAR, ''Carbon Dioxide Absorbs and Re-emits Infrared Radiation'' [Online], Available: http://scied.ucar.edu/carbon-dioxide-absorbs-and-re-emits-infrared-radiation</ref> This greenhouse effect is [[temperature of the Earth without the greenhouse effect\|necessary]] for the livable temperatures on Earth, however an increasing level of [[greenhouse gases]] is contributing to an unstable [[global warming\|warming of the Earth]] which is a cause for great concern. Read more about this imbalance [[Earth's energy budget#Earth's Energy Imbalance\|here]].

	Since the infrared spectrum is of lower energy than visible light, this limits the amount of solar energy we can ~~harness~~ with standard [[photovoltaic cell]]s.		Since the infrared spectrum is of lower energy than visible light, this limits the amount of solar energy that can be harnessed with standard [[photovoltaic cell]]s.

	==Use of IR==		==Use of IR==

	[[File:Nightvision.jpg\|200px\|thumb\|Figure 3. Night vision transforms infrared radiation emitted by objects into visible light that can be seen by the eye.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/5/52/Nightvision.jpg</ref>]]		[[File:Nightvision.jpg\|200px\|thumb\|Figure 3. Night vision transforms infrared radiation emitted by objects into visible light that can be seen by the human eye.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/5/52/Nightvision.jpg</ref>]]

	Infrared radiation has many applications, some being:		Infrared radiation has many applications, some being:
Line 22:		Line 22:
	* Imaging (biological, mineral, defense, astronomy)		* Imaging (biological, mineral, defense, astronomy)
	* Climatology and meteorology		* Climatology and meteorology

			==For Further Reading==
			*[[Electromagnetic radiation]]
			*[[Heat]]
			*[[Radiant energy]]
			*[[Remote sensing]]
			*[[Light]]
			*Or explore a [[Special:Random\|random page]]

	==References==		==References==
	{{reflist}}		{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

J.williams: 1 revision imported

2015-09-18T16:50:52Z

1 revision imported

← Older revision	Revision as of 16:50, 18 September 2015
(No difference)

Jhanania at 19:40, 3 September 2015

2015-09-03T19:40:06Z

← Older revision		Revision as of 19:40, 3 September 2015
Line 1:		Line 1:
	[[Category:Done 2015-06~~-11~~]]		[[Category:Done 2015-09-06]]
	[[File:Infrared_dog.jpg\|300px\|thumb\|Figure 1. A dog as seen in the infrared spectrum.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/0/0c/Infrared_dog.jpg</ref>]]		[[File:Infrared_dog.jpg\|300px\|thumb\|Figure 1. A dog as seen in the infrared spectrum.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/0/0c/Infrared_dog.jpg</ref>]]

Line 7:		Line 7:
	Even though infrared radiation cannot be seen, it can definitely be felt. Infrared energy is felt as [[heat]] because it interacts with [[molecule]]s by exciting them, causing them to move around more which increases internal [[temperature]] of the object absorbing it. Although all wavelengths of radiant energy will heat surfaces that absorb them, infrared radiation is most common in our daily lives because of the "ordinary" objects that emit it as [[radiant heat]] (see [[blackbody radiation]] and [[Wien's Law]] for more information on this).<ref>Hyperphysics, ''Heat Radiation'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/stefan.html#c2</ref> For example, humans at a temperature of [[celsius\|37°C]]<ref name=yea>R. A. Hinrichs and M. Kleinbach, "Heat and Work," in ''Energy: Its Use and the Environment'', 4th ed. Toronto, Ont. Canada: Thomson Brooks/Cole, 2006, ch.4, sec.E, pp.111-114</ref> emit most of their radiant heat in the infrared range, as can be seen in Figure 1.		Even though infrared radiation cannot be seen, it can definitely be felt. Infrared energy is felt as [[heat]] because it interacts with [[molecule]]s by exciting them, causing them to move around more which increases internal [[temperature]] of the object absorbing it. Although all wavelengths of radiant energy will heat surfaces that absorb them, infrared radiation is most common in our daily lives because of the "ordinary" objects that emit it as [[radiant heat]] (see [[blackbody radiation]] and [[Wien's Law]] for more information on this).<ref>Hyperphysics, ''Heat Radiation'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/stefan.html#c2</ref> For example, humans at a temperature of [[celsius\|37°C]]<ref name=yea>R. A. Hinrichs and M. Kleinbach, "Heat and Work," in ''Energy: Its Use and the Environment'', 4th ed. Toronto, Ont. Canada: Thomson Brooks/Cole, 2006, ch.4, sec.E, pp.111-114</ref> emit most of their radiant heat in the infrared range, as can be seen in Figure 1.

	[[File:~~Co2.gif~~.gif\|318px\|thumb\|Figure 2. Carbon dioxide is able to interact with infrared radiation, leading to an imbalance of radiation entering and leaving the atmosphere.<ref ~~name=UCAR~~/>]]		[[File:co2gif.gif\|318px\|thumb\|Figure 2. Carbon dioxide is able to interact with infrared radiation, leading to an imbalance of radiation entering and leaving the atmosphere.<ref>PhET Simulations, ''Molecules and Light'' [Online], Available: https://phet.colorado.edu/en/simulation/molecules-and-light</ref>]]

	Around 50% of the [[solar energy to the Earth\|Sun's energy to the Earth]] is in the form of infrared,<ref>Passive heating and cooling manual, ''Introduction to Solar Energy'' [Document], Available: http://www.azsolarcenter.com/design/documents/passive.DOC</ref> therefore the balance of this radiation in our [[atmosphere]] is crucial to keep a stable [[temperature of the Earth\|temperature]] and [[climate]]. [[Carbon dioxide]] in the atmosphere produces a [[greenhouse effect]], because CO<sub>2</sub> is able to absorb and re-emit infrared radiation as seen in Figure 2, unlike the gasses that make up most of the atmosphere ([[molecular oxygen]], O<sub>2</sub> about 21% and nitrogen, N<sub>2</sub>, about 78%).<ref name=UCAR>UCAR, ''Carbon Dioxide Absorbs and Re-emits Infrared Radiation'' [Online], Available: http://scied.ucar.edu/carbon-dioxide-absorbs-and-re-emits-infrared-radiation</ref> This greenhouse effect is [[temperature of the Earth without the greenhouse effect\|necessary]] for the livable temperatures on Earth, however an increasing level of [[greenhouse gases]] is contributing to an unstable [[global warming\|warming of the Earth]] which is a cause for great concern. Read more about this imbalance [[Earth's energy budget#Earth's Energy Imbalance\|here]].		Around 50% of the [[solar energy to the Earth\|Sun's energy to the Earth]] is in the form of infrared,<ref>Passive heating and cooling manual, ''Introduction to Solar Energy'' [Document], Available: http://www.azsolarcenter.com/design/documents/passive.DOC</ref> therefore the balance of this radiation in our [[atmosphere]] is crucial to keep a stable [[temperature of the Earth\|temperature]] and [[climate]]. [[Carbon dioxide]] in the atmosphere produces a [[greenhouse effect]], because CO<sub>2</sub> is able to absorb and re-emit infrared radiation as seen in Figure 2, unlike the gasses that make up most of the atmosphere ([[molecular oxygen]], O<sub>2</sub> about 21% and nitrogen, N<sub>2</sub>, about 78%).<ref name=UCAR>UCAR, ''Carbon Dioxide Absorbs and Re-emits Infrared Radiation'' [Online], Available: http://scied.ucar.edu/carbon-dioxide-absorbs-and-re-emits-infrared-radiation</ref> This greenhouse effect is [[temperature of the Earth without the greenhouse effect\|necessary]] for the livable temperatures on Earth, however an increasing level of [[greenhouse gases]] is contributing to an unstable [[global warming\|warming of the Earth]] which is a cause for great concern. Read more about this imbalance [[Earth's energy budget#Earth's Energy Imbalance\|here]].

J.williams: 1 revision imported

2015-08-26T21:31:13Z

1 revision imported

← Older revision	Revision as of 21:31, 26 August 2015
(No difference)

J.williams at 16:54, 12 August 2015

2015-08-12T16:54:48Z

New page

[[Category:Done 2015-06-11]]
[[File:Infrared_dog.jpg|300px|thumb|Figure 1. A dog as seen in the infrared spectrum.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/0/0c/Infrared_dog.jpg</ref>]]

<onlyinclude>'''Infrared radiation''' (IR) is a type of [[radiant energy]], with longer [[wavelength]]s than the visible [[light]] humans can see, but shorter wavelengths than radio waves. Its range extends from fairly small wavelengths near the color red, 700x10-9 [[meter|m]], to nearly a millimeter, 3x10-4 m.</onlyinclude><ref>CRISP, ''Electromagnetic waves'' [Online], Available: http://www.crisp.nus.edu.sg/~research/tutorial/em.htm</ref>

==Effect of IR==
Even though infrared radiation cannot be seen, it can definitely be felt. Infrared energy is felt as [[heat]] because it interacts with [[molecule]]s by exciting them, causing them to move around more which increases internal [[temperature]] of the object absorbing it. Although all wavelengths of radiant energy will heat surfaces that absorb them, infrared radiation is most common in our daily lives because of the "ordinary" objects that emit it as [[radiant heat]] (see [[blackbody radiation]] and [[Wien's Law]] for more information on this).<ref>Hyperphysics, ''Heat Radiation'' [Online], Available: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/stefan.html#c2</ref> For example, humans at a temperature of [[celsius|37°C]]<ref name=yea>R. A. Hinrichs and M. Kleinbach, "Heat and Work," in ''Energy: Its Use and the Environment'', 4th ed. Toronto, Ont. Canada: Thomson Brooks/Cole, 2006, ch.4, sec.E, pp.111-114</ref> emit most of their radiant heat in the infrared range, as can be seen in Figure 1.

[[File:Co2.gif.gif|318px|thumb|Figure 2. Carbon dioxide is able to interact with infrared radiation, leading to an imbalance of radiation entering and leaving the atmosphere.<ref name=UCAR/>]]

Around 50% of the [[solar energy to the Earth|Sun's energy to the Earth]] is in the form of infrared,<ref>Passive heating and cooling manual, ''Introduction to Solar Energy'' [Document], Available: http://www.azsolarcenter.com/design/documents/passive.DOC</ref> therefore the balance of this radiation in our [[atmosphere]] is crucial to keep a stable [[temperature of the Earth|temperature]] and [[climate]]. [[Carbon dioxide]] in the atmosphere produces a [[greenhouse effect]], because CO2 is able to absorb and re-emit infrared radiation as seen in Figure 2, unlike the gasses that make up most of the atmosphere ([[molecular oxygen]], O2 about 21% and nitrogen, N2, about 78%).<ref name=UCAR>UCAR, ''Carbon Dioxide Absorbs and Re-emits Infrared Radiation'' [Online], Available: http://scied.ucar.edu/carbon-dioxide-absorbs-and-re-emits-infrared-radiation</ref> This greenhouse effect is [[temperature of the Earth without the greenhouse effect|necessary]] for the livable temperatures on Earth, however an increasing level of [[greenhouse gases]] is contributing to an unstable [[global warming|warming of the Earth]] which is a cause for great concern. Read more about this imbalance [[Earth's energy budget#Earth's Energy Imbalance|here]].

Since the infrared spectrum is of lower energy than visible light, this limits the amount of solar energy we can harness with standard [[photovoltaic cell]]s.

==Use of IR==

[[File:Nightvision.jpg|200px|thumb|Figure 3. Night vision transforms infrared radiation emitted by objects into visible light that can be seen by the eye.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/5/52/Nightvision.jpg</ref>]]

Infrared radiation has many applications, some being:
* Heating (cooking, saunas, industrial)
* Night vision (goggles, cameras)<ref>American Technologies Network Corporation, ''How Night Vision Works'' [Online], Available: http://www.atncorp.com/HowNightVisionWorks</ref>
* Imaging (biological, mineral, defense, astronomy)
* Climatology and meteorology

==References==
{{reflist}}
[[Category:Uploaded]]