Light - Revision history

Jmdonev: 1 revision imported

2021-10-18T16:14:40Z

1 revision imported

← Older revision	Revision as of 16:14, 18 October 2021
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energy>Luisa at 15:29, 16 October 2021

2021-10-16T15:29:00Z

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	[[fr:Lumière]]		[[fr:Lumière]]
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			[[es:Luz]]
	<onlyinclude>'''Light''' is technically any form of [[radiant energy]], but is almost always taken to mean visible radiant energy.</onlyinclude> This visible radiant energy is between 380 nm (a nm is one billionth of a [[meter]]) and 750 nm. Figure 1 shows how small a portion of the total spectrum the visible spectrum is. Light is a form of [[electromagnetic radiation]], which means it has [[electric field]]s and [[magnetic field]]s vibrating back and forth very quickly as a [[wave]]. Because of the strangeness of [[quantum mechanics]], light is also made of little particles with no [[mass]], called [[photon]]s.		<onlyinclude>'''Light''' is technically any form of [[radiant energy]], but is almost always taken to mean visible radiant energy.</onlyinclude> This visible radiant energy is between 380 nm (a nm is one billionth of a [[meter]]) and 750 nm. Figure 1 shows how small a portion of the total spectrum the visible spectrum is. Light is a form of [[electromagnetic radiation]], which means it has [[electric field]]s and [[magnetic field]]s vibrating back and forth very quickly as a [[wave]]. Because of the strangeness of [[quantum mechanics]], light is also made of little particles with no [[mass]], called [[photon]]s.

Jmdonev: 1 revision imported

2021-09-27T00:03:11Z

1 revision imported

← Older revision	Revision as of 00:03, 27 September 2021
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energy>Ethan.boechler at 20:43, 10 September 2021

2021-09-10T20:43:52Z

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	[[Category:Done 2020-02-29]]		[[Category:Done 2020-02-29]]
	[[Category:Finley edit]]		[[Category:Finley edit]]
			[[Category:Translated to French]]
			[[fr:Lumière]]
	<onlyinclude>'''Light''' is technically any form of [[radiant energy]], but is almost always taken to mean visible radiant energy.</onlyinclude> This visible radiant energy is between 380 nm (a nm is one billionth of a [[meter]]) and 750 nm. Figure 1 shows how small a portion of the total spectrum the visible spectrum is. Light is a form of [[electromagnetic radiation]], which means it has [[electric field]]s and [[magnetic field]]s vibrating back and forth very quickly as a [[wave]]. Because of the strangeness of [[quantum mechanics]], light is also made of little particles with no [[mass]], called [[photon]]s.		<onlyinclude>'''Light''' is technically any form of [[radiant energy]], but is almost always taken to mean visible radiant energy.</onlyinclude> This visible radiant energy is between 380 nm (a nm is one billionth of a [[meter]]) and 750 nm. Figure 1 shows how small a portion of the total spectrum the visible spectrum is. Light is a form of [[electromagnetic radiation]], which means it has [[electric field]]s and [[magnetic field]]s vibrating back and forth very quickly as a [[wave]]. Because of the strangeness of [[quantum mechanics]], light is also made of little particles with no [[mass]], called [[photon]]s.

Jmdonev: 1 revision imported

2020-04-28T15:32:41Z

1 revision imported

← Older revision	Revision as of 15:32, 28 April 2020
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energy>Jmdonev at 22:26, 10 April 2020

2020-04-10T22:26:04Z

← Older revision		Revision as of 22:26, 10 April 2020
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	[[Category:Done ~~2015~~-10-15]]		[[Category:Done 2020-02-29]]
			[[Category:Finley edit]]
	<onlyinclude>'''Light''' is technically any form of [[radiant energy]], but is almost always taken to mean visible radiant energy.</onlyinclude> This visible radiant energy is between 380 nm (a nm is one billionth of a [[meter]]) and 750 nm. Figure 1 shows how small a portion of the total spectrum the visible spectrum is. Light is a form of [[electromagnetic radiation]], which means it has [[electric field]]s and [[magnetic field]]s vibrating back and forth very quickly as a [[wave]]. Because of the strangeness of [[quantum mechanics]], light is also made of little particles with no [[mass]], called [[photon]]s.		<onlyinclude>'''Light''' is technically any form of [[radiant energy]], but is almost always taken to mean visible radiant energy.</onlyinclude> This visible radiant energy is between 380 nm (a nm is one billionth of a [[meter]]) and 750 nm. Figure 1 shows how small a portion of the total spectrum the visible spectrum is. Light is a form of [[electromagnetic radiation]], which means it has [[electric field]]s and [[magnetic field]]s vibrating back and forth very quickly as a [[wave]]. Because of the strangeness of [[quantum mechanics]], light is also made of little particles with no [[mass]], called [[photon]]s.

	Light, unsurprisingly, travels at the [[speed of light]], which is the fastest anything can go. Light is bent (refracted) with various types of lenses for a number of purposes (in eyeglasses, in microscopes and telescopes, in projectors as in a movie theater, etc.). Light is a form of [[energy]], which is why [[photovoltaic cell]]s can harness the [[flow]] of [[sunlight]] to make [[electricity]].		Light, unsurprisingly, travels at the [[speed of light]], which is the fastest anything can go. Light is bent (refracted) with various types of lenses for a number of purposes (in eyeglasses, in microscopes and telescopes, in projectors as in a movie theater, etc.). Light is a form of [[energy]], which is why [[photovoltaic cell]]s can harness the [[primary energy flow]] of [[sunlight]] to make [[electricity]].

	Light is needed for humans to maintain a high [[quality of life]] and is one of the major uses of [[energy]] (often electricity, but fire works as well, often in the form of burning [[biomass]]). [[lighting\|Home lighting]] extends a person's day, and allows for many leisure and economic opportunities after the [[sun]] ceases to provide sunlight. People often get light from [[kerosene lantern]]s in [[developing countries]] and from a variety of [[light bulb]]s in [[developed countries]] (like [[LED light bulb]]s, [[CFL light bulb]]s, and [[incandescent light bulb]]s).		Light is needed for humans to maintain a high [[quality of life]] and is one of the major uses of [[energy]] (often electricity, but fire works as well, often in the form of burning [[biomass]]). [[lighting\|Home lighting]] extends a person's day, and allows for many leisure and economic opportunities after the [[sun]] ceases to provide sunlight. People often get light from [[kerosene lantern]]s in [[developing countries]] and from a variety of [[light bulb]]s in [[developed countries]] (like [[LED light bulb]]s, [[CFL light bulb]]s, and [[incandescent light bulb]]s).

J.williams: 1 revision imported

2015-11-13T01:47:36Z

1 revision imported

← Older revision	Revision as of 01:47, 13 November 2015
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Jmdonev at 19:55, 8 November 2015

2015-11-08T19:55:22Z

← Older revision		Revision as of 19:55, 8 November 2015
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	[[Category:Done 2015-07-24]]		[[Category:Done 2015-10-15]]
	<onlyinclude>'''Light''' is technically any form of [[radiant energy]], but is almost always taken to mean visible radiant energy.</onlyinclude> This visible radiant energy is between 380 nm (a nm is one billionth of a [[meter]]) and 750 nm. Figure 1 shows how small a portion of the total spectrum the visible spectrum is. Light is a form of [[electromagnetic radiation]], which means it has [[electric field]]s and [[magnetic field]]s vibrating back and forth very quickly as a [[wave]]. Because of the strangeness of [[quantum mechanics]], light is also made of little particles with no [[mass]], called [[photon]]s.		<onlyinclude>'''Light''' is technically any form of [[radiant energy]], but is almost always taken to mean visible radiant energy.</onlyinclude> This visible radiant energy is between 380 nm (a nm is one billionth of a [[meter]]) and 750 nm. Figure 1 shows how small a portion of the total spectrum the visible spectrum is. Light is a form of [[electromagnetic radiation]], which means it has [[electric field]]s and [[magnetic field]]s vibrating back and forth very quickly as a [[wave]]. Because of the strangeness of [[quantum mechanics]], light is also made of little particles with no [[mass]], called [[photon]]s.

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	Light is needed for humans to maintain a high [[quality of life]] and is one of the major uses of [[energy]] (often electricity, but fire works as well, often in the form of burning [[biomass]]). [[lighting\|Home lighting]] extends a person's day, and allows for many leisure and economic opportunities after the [[sun]] ceases to provide sunlight. People often get light from [[kerosene lantern]]s in [[developing countries]] and from a variety of [[light bulb]]s in [[developed countries]] (like [[LED light bulb]]s, [[CFL light bulb]]s, and [[incandescent light bulb]]s).		Light is needed for humans to maintain a high [[quality of life]] and is one of the major uses of [[energy]] (often electricity, but fire works as well, often in the form of burning [[biomass]]). [[lighting\|Home lighting]] extends a person's day, and allows for many leisure and economic opportunities after the [[sun]] ceases to provide sunlight. People often get light from [[kerosene lantern]]s in [[developing countries]] and from a variety of [[light bulb]]s in [[developed countries]] (like [[LED light bulb]]s, [[CFL light bulb]]s, and [[incandescent light bulb]]s).

	[[File:EM spectrumrevised.png\|756x420px\|~~framed~~\|center\|Figure 1. The electromagnetic spectrum:<ref>P. Ronan, Gringer. (2013, Feb. 19). ''EM spectrum revised'' [Online]. Available: http://upload.wikimedia.org/wikipedia/commons/3/30/EM_spectrumrevised.png</ref> more energy corresponds to shorter [[wavelength]] and higher [[frequency]], since all three quantities are closely related. The radiant energy of a photon can span many orders of magnitude (a factor of 10<sup>24</sup>!), but only a very small portion is visible, as seen here. ]]		[[File:EM spectrumrevised.png\|756x420px\|thumb\|center\|Figure 1. The electromagnetic spectrum:<ref>P. Ronan, Gringer. (2013, Feb. 19). ''EM spectrum revised'' [Online]. Available: http://upload.wikimedia.org/wikipedia/commons/3/30/EM_spectrumrevised.png</ref> more energy corresponds to shorter [[wavelength]] and higher [[frequency]], since all three quantities are closely related. The radiant energy of a photon can span many orders of magnitude (a factor of 10<sup>24</sup>!), but only a very small portion is visible, as seen here. ]]

	The study of light has an entire branch of physics devoted to it called optics; hyperphysics is an excellent place to learn more about [http://hyperphysics.phy-astr.gsu.edu/hbase/ligcon.html#c1 optics].		The study of light has an entire branch of physics devoted to it called optics; hyperphysics is an excellent place to learn more about [http://hyperphysics.phy-astr.gsu.edu/hbase/ligcon.html#c1 optics].

J.williams: 1 revision imported

2015-08-26T21:31:16Z

1 revision imported

← Older revision	Revision as of 21:31, 26 August 2015
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J.williams at 16:54, 12 August 2015

2015-08-12T16:54:57Z

New page

[[Category:Done 2015-07-24]]
<onlyinclude>'''Light''' is technically any form of [[radiant energy]], but is almost always taken to mean visible radiant energy.</onlyinclude> This visible radiant energy is between 380 nm (a nm is one billionth of a [[meter]]) and 750 nm. Figure 1 shows how small a portion of the total spectrum the visible spectrum is. Light is a form of [[electromagnetic radiation]], which means it has [[electric field]]s and [[magnetic field]]s vibrating back and forth very quickly as a [[wave]]. Because of the strangeness of [[quantum mechanics]], light is also made of little particles with no [[mass]], called [[photon]]s.

Light, unsurprisingly, travels at the [[speed of light]], which is the fastest anything can go. Light is bent (refracted) with various types of lenses for a number of purposes (in eyeglasses, in microscopes and telescopes, in projectors as in a movie theater, etc.). Light is a form of [[energy]], which is why [[photovoltaic cell]]s can harness the [[flow]] of [[sunlight]] to make [[electricity]].

Light is needed for humans to maintain a high [[quality of life]] and is one of the major uses of [[energy]] (often electricity, but fire works as well, often in the form of burning [[biomass]]). [[lighting|Home lighting]] extends a person's day, and allows for many leisure and economic opportunities after the [[sun]] ceases to provide sunlight. People often get light from [[kerosene lantern]]s in [[developing countries]] and from a variety of [[light bulb]]s in [[developed countries]] (like [[LED light bulb]]s, [[CFL light bulb]]s, and [[incandescent light bulb]]s).

[[File:EM spectrumrevised.png|756x420px|framed|center|Figure 1. The electromagnetic spectrum:<ref>P. Ronan, Gringer. (2013, Feb. 19). ''EM spectrum revised'' [Online]. Available: http://upload.wikimedia.org/wikipedia/commons/3/30/EM_spectrumrevised.png</ref> more energy corresponds to shorter [[wavelength]] and higher [[frequency]], since all three quantities are closely related. The radiant energy of a photon can span many orders of magnitude (a factor of 10<sup>24</sup>!), but only a very small portion is visible, as seen here. ]]

The study of light has an entire branch of physics devoted to it called optics; hyperphysics is an excellent place to learn more about [http://hyperphysics.phy-astr.gsu.edu/hbase/ligcon.html#c1 optics].

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