⁣Astrobiology | The Universe

This BBC science documentary on the secrets of light and energy quantum physics, highlights the formation, transference and storage of energy as well as how light is reflected and "created".

Light energy is a kind of kinetic energy with the ability to make types of light visible to human eyes. Light is defined as a form of electromagnetic radiation emitted by hot objects like lasers, bulbs, and the sun. Light contains photons which are minute packets of energy.

Electromagnetic Spectrum , a science documentary explaning forms of lightThe visible light that we see is just a small part of the actual light emitted throughout the universe. Through the combination of electrical and magnetic fields, light energy is produced. Nothing in the universe moves faster than the speed of light, which is 186,000 miles per second, or 670,000,000 miles per hour. Light travels in different wavelengths. The portion of light we see, referred to as visible light, shows up as the colors of the rainbow. These are red, orange, yellow, green, blue, indigo and violet. The other types of light in the spectrum, or the invisible light, are radio, microwave, infrared, ultraviolet, x-ray, and gamma ray. In this order, radio waves have the longest wavelength, while gamma rays have the shortest.Since all matter emits light, we can use infrared telescopes to see stars and dust in space that we would otherwise be unable to see. And by viewing the color of the star, we can gauge its distance and its temperature.

Following on from the multiple award-winning "Limits of Perception" and "Time Limits", this is the third and final part of the trilogy of films that explores the limits of our everyday perceptions and beyond, showing that the world is a far more remarkable place than most of us ever realise. Humans are visual creatures -- sight is our main sense. Yet our eyes often deceive us in peculiar ways. There is far more to light than meets the eye. This fascinating documentary explores the human's visible spectrum of light and ventures even further into territories we cannot sense by ourselves without technical equipment: from coloured light to gamma rays, that could destroy all life on Earth, as well as radio waves, without which our modern society would be impossible. The film also follows the great pioneers, from Newton and Einstein, to Herschel and Roentgen, whose genius uncovered the marvels of the electro-magnetic spectrum and took us far beyond the limits of light.

The True Nature Of Light and Energy Space Science BBC DocumentaryDocumentaries Documentary HD BBC

Noam Chomsky shares his insights regarding the ongoing problems confronting the beleaguered nation of Haiti, particularly the US role minimizing and undermining their economic development, resulting in horrendous destruction and loss of at least 300,000 lives from the recent earthquake. A lively Q and A session follows the talk. Benefit for Haiti at The Riverside Church of New York, June 8, 2010 sponsored by IFCO-Pastors For Peace and The Riverside Church Social Justice Ministries. Camera: Joe Friendly

Depicts an experiment at Massachusetts Institute of Technology and on top of Mt Washington, New Hampshire, using radioactive decay of cosmic ray mu-mesons to show the dilation of time. Features David H Frisch, Mit, and James H Smith, University of Illinois

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