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There are 21 videos in this category and 48 videos in 7 subcategories.
Category Videos
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Not Right For WatchKnowLearn
Ages: 8 - 18
3413 Views:
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In this interactive activity adapted from Shedding Light on Science, learn about the primary colors of light and pigment. First, see red, green, and blue gelatin blocks used as filters to demonstrate the absorption of specific wavelengths of light. T...hen watch as three desk lamps with red, green, and blue filters show how the primary colors of light are mixed to create other colors. Finally, watch a demonstration of how paints both absorb and reflect light and how the primary colors of pigment are mixed to create other colors.
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May 19, 2012 at 11:17 PM
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Not Right For WatchKnowLearn
Ages: 8 - 13
12399 Views:
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Light is a very important energy source that helps keep us warm and lets us see the world. Light travels in waves through bundles of energy called photons. The photons contain all seven colors of the rainbow. Grab a prism and check them out! Learn... more about light with this cartoon animation from StudyJams. A short, self-checking quiz is also included with this link.
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May 28, 2011 at 01:58 PM
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Not Right For WatchKnowLearn
Ages: 14 - 18
1990 Views:
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Diffraction is a wonderful and fascinating topic that I find my students have difficulty grasping at first. I hope this video gives a clear picture. (18:00)
July 22, 2012 at 01:15 PM
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Not Right For WatchKnowLearn
Ages: 15 - 18
2279 Views:
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Current research which shows how a biological function can be turned on and off with the use of a light source, with the possibility of using it in future medications. "Food coma" takes on new meaning when nematodes are fed a light-sensitive chemical.... After the meal, the worms become paralyzed if exposed to UV light. Remarkably, the effects can be reversed under visible light. This video could also be used with a lesson on medical research, medical advancements, or the scientific process. (02:50)
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January 18, 2010 at 09:33 PM
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Not Right For WatchKnowLearn
Ages: 14 - 18
1815 Views:
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PowerPoint with voiced explanations goes over how to construct ray diagrams for thin converging lenses (concave and convex). Understand the terms virtual image, object and ray. Goes over focal length and focal point. Three cases used as examples. ...Some video as well. Length 12:08
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June 16, 2012 at 08:02 AM
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Not Right For WatchKnowLearn
Ages: 10 - 18
2527 Views:
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In this "Ask an Astronomer" episode (03:05), Dr. Carolyn Brinkworth fills us in on what the color of the sky has to do with finding life on distant planets.
May 2, 2010 at 07:43 PM
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Not Right For WatchKnowLearn
Ages: 13 - 18
1559 Views:
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Light and electromagnetic radiation (09:37)
June 5, 2012 at 09:04 PM
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Not Right For WatchKnowLearn
Ages: 11 - 18
4045 Views:
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Light and Color
From teachersdomain.org, produced by WGBH Educational Gouindation
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In this video segment adapted from Shedding Light on Science, learn about the dispersion of light, the electromagnetic spectrum, and how sunlight contains a range of wavelengths (photons of differing energy). Isaac Newton investigated sunlight by shi...ning it through a glass prism; after the prism refracted the light, he saw a spectrum of colors. He recognized that sunlight was made up of many colors, which could not be further separated when passed through a second prism. Drops of water in the air have the same dispersion effect. In the video, a bowl of water is used to simulate a giant raindrop to show how the differing angles of refraction of different wavelengths create rainbows. Run time 03:55.
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August 12, 2010 at 09:43 PM
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Not Right For WatchKnowLearn
Ages: 7 - 12
24376 Views:
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Light always travels in a straight line until something gets in its way. When that happens, light can be absorbed, reflected, or refracted, depending on what kind of surface it hits. Learn more about light with this cartoon animation from StudyJams.... A short, self-checking quiz is also included with this link.
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June 4, 2011 at 08:43 PM
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Not Right For WatchKnowLearn
Ages: 11 - 18
1982 Views:
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In this video from the Encyclopedia of Physics Demonstrations, learn about total internal reflection. A laser beam is aligned so that the light passes through a water tank and out through an opening. As water flows out of the opening, observe how the... laser beam remains trapped in the water stream because of total internal reflection. See how the light follows the path of the water even when the flow changes. Run time 01:03.
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August 12, 2010 at 09:34 PM
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