Submerge Christmas light in liquid nitrogen - Revision history

Bes at 00:15, 27 January 2017

2017-01-27T00:15:39Z

Kddyejun at 23:54, 26 January 2017

2017-01-26T23:54:34Z

Kddyejun at 23:53, 26 January 2017

2017-01-26T23:53:34Z

Kddyejun at 23:51, 26 January 2017

2017-01-26T23:51:26Z

Kddyejun at 23:47, 26 January 2017

2017-01-26T23:47:06Z

Kddyejun at 23:46, 26 January 2017

2017-01-26T23:46:45Z

Bes at 23:40, 26 January 2017

2017-01-26T23:40:41Z

Bes at 23:40, 26 January 2017

2017-01-26T23:40:14Z

Bes at 23:38, 26 January 2017

2017-01-26T23:38:42Z

Kddyejun: Created page with " Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them i..."

2017-01-26T23:31:52Z

Created page with " Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them i..."

New page

Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them in liquid nitrogen.

Here is a youtube clip that shows exactly same thing that we did in lab.
https://youtu.be/4w1HifFayNU

As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure, the change in color of light we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment.
[[File:Wavelength change.jpg|500px|thumb|center|Wavelength of Christmas lights before and after dipping it into liquid nitrogen]]

[[File:Wavelength-nm.jpg|200px|thumb|right|alt text]]Change in color implies that there was a change in wavelength at the same time because visible colors have specific wavelengths. In this experiment, what we've seen was the orange light turned to yellow light. Meaning that there was a change in wavelegth; the wavelength shifted to the left or shorter wavelength.

[[File:Fluorescence_pic.jpg|200px|thumb|right|Mechanism of Fluorescence]] If you have watched the youtube clip, you should have found out that the color of chirstmas light turned yellow from orange. This is because the coldness changed what is called thermal population of the Christmas lights. What it means is that by dipping the Christmas lights into liquid nitrogen, the electrons in each energy level dropped down to lower energy level. Now, the electrons cannot be excited to higher energy level what used to but lower energy level. Due to the difference in energy level, now, the fluorescence emit different color.

← Older revision		Revision as of 00:15, 27 January 2017
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		+	[[Light_lab_Pchem\|Return to Light lab]]
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	by Yejun Park (Chem 322, Spring 2017)		by Yejun Park (Chem 322, Spring 2017)

← Older revision		Revision as of 23:54, 26 January 2017
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−	As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure the change in color of light, we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment. The wavelengths of two clearly showed that there was a color change due to change in temperature. Interestingly, the yellow light tended to go back to orange light as soon as it got warmer.	+
		+	[[File:Wavelength-nm.jpg\|200px\|thumb\|right\|alt text]]Change in color implies that there was a change in wavelength at the same time because visible colors have specific wavelengths. In this experiment, what we've seen was the orange light turned to yellow light. Meaning that there was a change in wavelegth; the wavelength shifted to the left or shorter wavelength. As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure the change in color of light, we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment. The wavelengths of two clearly showed that there was a color change due to change in temperature. Interestingly, the yellow light tended to go back to orange light as soon as it got warmer.
	[[File:Wavelength change.jpg\|500px\|thumb\|center\|Wavelength of Christmas lights before and after dipping it into liquid nitrogen; ''Data Collected by: Yejun Park and Samer Aljundi'']]		[[File:Wavelength change.jpg\|500px\|thumb\|center\|Wavelength of Christmas lights before and after dipping it into liquid nitrogen; ''Data Collected by: Yejun Park and Samer Aljundi'']]

−
−
−
−	[[File:Wavelength-nm.jpg\|200px\|thumb\|right\|alt text]]Change in color implies that there was a change in wavelength at the same time because visible colors have specific wavelengths. In this experiment, what we've seen was the orange light turned to yellow light. Meaning that there was a change in wavelegth; the wavelength shifted to the left or shorter wavelength.

← Older revision		Revision as of 23:53, 26 January 2017
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−	Here is a link which might give you a better explanation, http://~~io9~~.~~gizmodo~~.com/watch~~-an~~-led-light-change-color-in-liquid~~-nitrogen-1574982405~~	+	Here is a link which might give you a better explanation, http://www.physics-astronomy.com/2014/06/watch-led-light-change-color-in-liquid.html#.WIqLmlMrKUl
−

	If you still have doubt, take Inorganic class!		If you still have doubt, take Inorganic class!

← Older revision		Revision as of 23:51, 26 January 2017
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	[[File:Fluorescence_pic.jpg\|200px\|thumb\|right\|Mechanism of Fluorescence]] If you have watched the youtube clip, you should have found out that the color of chirstmas light turned yellow from orange. This is because the coldness changed what is called thermal population of the Christmas lights. What it means is that by dipping the Christmas lights into liquid nitrogen, the electrons in each energy level dropped down to lower energy level. Now, the electrons cannot be excited to higher energy level what used to but lower energy level. Due to the difference in energy level, now, the fluorescence emit different color.		[[File:Fluorescence_pic.jpg\|200px\|thumb\|right\|Mechanism of Fluorescence]] If you have watched the youtube clip, you should have found out that the color of chirstmas light turned yellow from orange. This is because the coldness changed what is called thermal population of the Christmas lights. What it means is that by dipping the Christmas lights into liquid nitrogen, the electrons in each energy level dropped down to lower energy level. Now, the electrons cannot be excited to higher energy level what used to but lower energy level. Due to the difference in energy level, now, the fluorescence emit different color.
		+
		+
		+
		+
		+	Here is a link which might give you a better explanation, http://io9.gizmodo.com/watch-an-led-light-change-color-in-liquid-nitrogen-1574982405
		+
		+
		+	If you still have doubt, take Inorganic class!

@@ Line 8: / Line 8: @@
-As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure the change in color of light, we measured the wavelength of each color before and after dipping by using instrument called,  Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment. The wavelengths of two clearly showed that there was a color change due to change in temperature.
+As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure the change in color of light, we measured the wavelength of each color before and after dipping by using instrument called,  Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment. The wavelengths of two clearly showed that there was a color change due to change in temperature. Interestingly, the yellow light tended to go back to orange light as soon as it got warmer.
 [[File:Wavelength change.jpg|500px|thumb|center|Wavelength of Christmas lights before and after dipping it into liquid nitrogen; ''Data Collected by: Yejun Park and Samer Aljundi'']]
-Interestingly, the yellow light tended to go back to orange light as soon as it got warmer.
 [[File:Wavelength-nm.jpg|200px|thumb|right|alt text]]Change in color implies that there was a change in wavelength at the same time because visible colors have specific wavelengths. In this experiment, what we've seen was the orange light turned to yellow light. Meaning that there was a change in wavelegth; the wavelength shifted to the left or shorter wavelength.

← Older revision		Revision as of 23:40, 26 January 2017
Line 9:		Line 9:

	As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure, the change in color of light we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment.		As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure, the change in color of light we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment.
−	[[File:Wavelength change.jpg\|500px\|thumb\|center\|Wavelength of Christmas lights before and after dipping it into liquid nitrogen]]	+	[[File:Wavelength change.jpg\|500px\|thumb\|center\|Wavelength of Christmas lights before and after dipping it into liquid nitrogen; ''Data Collected by: Yejun Park and Samer Aljundi'']]
		+

−	~~''Data Collected by: Yejun Park and Samer Aljundi''~~

← Older revision		Revision as of 23:40, 26 January 2017
Line 10:		Line 10:
	As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure, the change in color of light we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment.		As it is shown in the youtube clip, dipping the Christmas lights changed the color of light. To ensure, the change in color of light we measured the wavelength of each color before and after dipping by using instrument called, Ocean Optics and Bed Tide USB650 UV. Graph below is the data that we got from this experiment.
	[[File:Wavelength change.jpg\|500px\|thumb\|center\|Wavelength of Christmas lights before and after dipping it into liquid nitrogen]]		[[File:Wavelength change.jpg\|500px\|thumb\|center\|Wavelength of Christmas lights before and after dipping it into liquid nitrogen]]
		+
		+	''Data Collected by: Yejun Park and Samer Aljundi''

← Older revision		Revision as of 23:38, 26 January 2017
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		+	by Yejun Park (Chem 322, Spring 2017)

	Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them in liquid nitrogen.		Wavelength of a light can be affected by temperature. To investigate this phenomenon, we decided to compare the wavelength of Christmas lights before and after putting them in liquid nitrogen.