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2020-04-28T15:32:22Z

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energy>Jmdonev: /* Phet Simulation */

2020-02-17T21:25:22Z

Phet Simulation

← Older revision		Revision as of 21:25, 17 February 2020
Line 1:		Line 1:
	~~[[Category:Phets]]~~ [[Category:Done ~~2015~~-08-~~21]]~~		[[Category:Done 2020-02-29]]
	~~[[Category: Check Images]] [[Category: Needs Citations~~]]
	[[File:Wavelength.jpg\|250px\|thumbnail\|right\|Figure 1 Wavelength is measured from anywhere on the wave until the shape repeats<ref>TechAdapt Accessible Media Center (n.d.) "Characteristics of Waves: Wavelength" [Online]. Available: http://accessiblemediacenter.techadapt.com/samples/CAST_Exemplars/Exemplar6/content/bodymatter-level2-82.htm</ref>]]		[[File:Wavelength.jpg\|250px\|thumbnail\|right\|Figure 1 Wavelength is measured from anywhere on the wave until the shape repeats<ref>TechAdapt Accessible Media Center (n.d.) "Characteristics of Waves: Wavelength" [Online]. Available: http://accessiblemediacenter.techadapt.com/samples/CAST_Exemplars/Exemplar6/content/bodymatter-level2-82.htm</ref>]]

	<onlyinclude>The '''wavelength''' of a specific wave is the distance over which a wave repeats. These repeating patterns known as wavelengths are represented by the letter lambda (''λ''). </onlyinclude>Waves carry [[energy]] through a medium (like the [[atmosphere]], the [[vacuum]], or even the [[ocean]]). For more on the physics of waves please see [http://hyperphysics.phy-astr.gsu.edu/hbase/waves/funhar.html#c2 hyperphysics].		<onlyinclude>The '''wavelength''' of a specific wave is the distance over which a wave repeats, as shown in Figure 1. These repeating patterns known as wavelengths are represented by the letter lambda (''λ''). </onlyinclude>Waves carry [[energy]] through a medium (like the [[atmosphere]], the [[vacuum]], or even the [[ocean]]). For more on the physics of waves please see [http://hyperphysics.phy-astr.gsu.edu/hbase/waves/funhar.html#c2 hyperphysics].

	[[File:Wavelength_light.jpg\|250px\|thumbnail\|right\|Figure 2 Wavelengths of visible and non-visible light<ref>NASA (n.d.) "What Wavelength Goes With a Color?" [Online]. Available: http://science-edu.larc.nasa.gov/EDDOCS/Wavelengths_for_Colors.html</ref>]]		[[File:Wavelength_light.jpg\|250px\|thumbnail\|right\|Figure 2 Wavelengths of visible and non-visible light<ref>NASA (n.d.) "What Wavelength Goes With a Color?" [Online]. Available: http://science-edu.larc.nasa.gov/EDDOCS/Wavelengths_for_Colors.html</ref>]]

	Light is categorized according to its wavelength or frequency. The [[frequency]] ''f'', wavelength ''λ'', and [[speed]] ''v'' of the wave are connected by the equation ''v = λf''. For light, ''c'' is the [[speed of light]], and the equation becomes ''c = λf''. The longer the wavelength the lower the [[energy]] for the [[photon]] (the packet of light)~~. As shown in figure 2, the wavelength of light goes from smaller than an [[atom]]~~ to the ~~size of cities!~~		[[Light]] is categorized according to its wavelength or frequency. The [[frequency]] ''f'', wavelength ''λ'', and [[speed]] ''v'' of the wave are connected by the equation ''v = λf''.<ref>"Wave Relationship", Hyperphysics.phy-astr.gsu.edu. [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/wavrel.html#c1. [Accessed: 09- Feb- 2020].</ref> For light, ''c'' is the [[speed of light]], and the equation becomes ''c = λf''. The longer the wavelength, the lower the [[energy]] for the [[photon]] (the packet of light); due to the equation for energy contained in a photon:

	When light comes in from the [[sun]] and strikes the surface of the Earth, the light bounces back and the wavelength gets longer. This longer wavelength light (now in the infrared) interacts with the [[greenhouse gas]]es in the [[atmosphere]] and bounces around, warming the planet. This difference in wavelength is important because the shorter wavelength photons coming in pass right through the greenhouse gases (like [[carbon dioxide]], [[methane]], or [[water vapour]]), but the longer wavelength (lower energy) photons get absorbed. This phenomenon leads to [[global warming]], a form of [[climate change]].		<math>E = \frac{hc}{ \lambda}</math> or <math>E = hf</math><ref>"Photoelectric Effect", Hyperphysics.phy-astr.gsu.edu. [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/mod2.html. [Accessed: 09- Feb- 2020].</ref>

			Where:
			*<math>E</math> = energy of the photon
			*<math>h</math> = [[Planck's constant]] (6.62606957(29)×10<sup>-34</sup> [[joule\|J]]·[[second\|s]] )
			*<math>\lambda</math> = photon wavelength
			*<math>c</math> = [[speed of light]] (299,792,458 [[meter\|m]]/s)<ref>"Lorentz Transformation", Hyperphysics.phy-astr.gsu.edu. [Online]. Available: http://hyperphysics.phy-astr.gsu.edu/hbase/Relativ/ltrans.html#c3. [Accessed: 09- Feb- 2020].</ref>
			*<math>f</math> = photon frequency


			As shown in Figure 2, the wavelength of light goes from smaller than an [[atom]] to the size of cities!

			When light comes in from the [[sun]] and strikes the surface of the Earth, the light bounces back and the wavelength gets longer. This longer wavelength light (now in the infrared) interacts with the [[greenhouse gas]]es in the [[atmosphere]] and bounces around, warming the planet. This difference in wavelength is important because the shorter wavelength photons coming in pass right through the greenhouse gases (like [[carbon dioxide]], [[methane]], or [[water vapour]]), but the longer wavelength (lower energy) photons get absorbed. This phenomenon, known as the [[greenhouse effect]], leads to [[global warming]], a form of [[climate change]].

	==Phet Simulation==		==Phet Simulation==
	The [http://phet.colorado.edu/ University of Colorado] has graciously allowed us to use the following Phet simulation. The simulation below allows you to see the interaction among speed, wavelength, and frequency. Wiggle the wrench up and down to create waves of different wavelengths. In order to see this best, click "no end," "oscillate," and turn the damping down to zero.		The [http://phet.colorado.edu/ University of Colorado] has graciously allowed us to use the following Phet simulation. The simulation below allows you to see the interaction among speed, wavelength, and frequency. Wiggle the wrench up and down to create waves of different wavelengths. In order to see this best, click "no end," "oscillate," and turn the damping down to zero.
	<html>		<html>
	<iframe src="~~http~~://phet.colorado.edu/sims/wave-on-a-string/wave-on-a-string_en.html" width="800" height="600"></iframe>		<iframe src="https://phet.colorado.edu/sims/html/wave-on-a-string/latest/wave-on-a-string_en.html" width="800" height="600"></iframe>
	</html>		</html>

			==For Further Reading==
			*[[Photon]]
			*[[Speed of light]]
			*[[Energy]]
			*[[Greenhouse effect]]
			*[[Light]]
			*Or explore a [[Special:Random\|random page]]

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

J.williams: 1 revision imported

2015-08-26T21:31:48Z

1 revision imported

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

J.williams at 17:00, 12 August 2015

2015-08-12T17:00:31Z

New page

[[Category:Phets]] [[Category:Done 2015-08-21]]
[[Category: Check Images]] [[Category: Needs Citations]]
[[File:Wavelength.jpg|250px|thumbnail|right|Figure 1 Wavelength is measured from anywhere on the wave until the shape repeats<ref>TechAdapt Accessible Media Center (n.d.) "Characteristics of Waves: Wavelength" [Online]. Available: http://accessiblemediacenter.techadapt.com/samples/CAST_Exemplars/Exemplar6/content/bodymatter-level2-82.htm</ref>]]

<onlyinclude>The '''wavelength''' of a specific wave is the distance over which a wave repeats. These repeating patterns known as wavelengths are represented by the letter lambda (''λ''). </onlyinclude>Waves carry [[energy]] through a medium (like the [[atmosphere]], the [[vacuum]], or even the [[ocean]]). For more on the physics of waves please see [http://hyperphysics.phy-astr.gsu.edu/hbase/waves/funhar.html#c2 hyperphysics].

[[File:Wavelength_light.jpg|250px|thumbnail|right|Figure 2 Wavelengths of visible and non-visible light<ref>NASA (n.d.) "What Wavelength Goes With a Color?" [Online]. Available: http://science-edu.larc.nasa.gov/EDDOCS/Wavelengths_for_Colors.html</ref>]]

Light is categorized according to its wavelength or frequency. The [[frequency]] ''f'', wavelength ''λ'', and [[speed]] ''v'' of the wave are connected by the equation ''v = λf''. For light, ''c'' is the [[speed of light]], and the equation becomes ''c = λf''. The longer the wavelength the lower the [[energy]] for the [[photon]] (the packet of light). As shown in figure 2, the wavelength of light goes from smaller than an [[atom]] to the size of cities!

When light comes in from the [[sun]] and strikes the surface of the Earth, the light bounces back and the wavelength gets longer. This longer wavelength light (now in the infrared) interacts with the [[greenhouse gas]]es in the [[atmosphere]] and bounces around, warming the planet. This difference in wavelength is important because the shorter wavelength photons coming in pass right through the greenhouse gases (like [[carbon dioxide]], [[methane]], or [[water vapour]]), but the longer wavelength (lower energy) photons get absorbed. This phenomenon leads to [[global warming]], a form of [[climate change]].

==Phet Simulation==
The [http://phet.colorado.edu/ University of Colorado] has graciously allowed us to use the following Phet simulation. The simulation below allows you to see the interaction among speed, wavelength, and frequency. Wiggle the wrench up and down to create waves of different wavelengths. In order to see this best, click "no end," "oscillate," and turn the damping down to zero.
<html>
<iframe src="http://phet.colorado.edu/sims/wave-on-a-string/wave-on-a-string_en.html" width="800" height="600"></iframe>
</html>

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

Wavelength - Revision history

Jmdonev: 1 revision imported

energy>Jmdonev: /* Phet Simulation */

J.williams: 1 revision imported

J.williams at 17:00, 12 August 2015