Light waves, visible and invisible - Lucianne Walkowicz

View full lesson: http://ed.ted.com/lessons/light-waves-visible-and-invisible-lucianne-walkowicz Each kind of light has a unique wavelength, but human eyes can only perceive a tiny slice of...

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What if you could only see one color?Imagine, for instance,that you could only see things that were redand that everything elsewas completely invisible to you.As it turns out,that's how you live your life all the timebecause your eyes can only seea minuscule part of the full spectrum of light.Different kinds of light are all around you everydaybut are invisible to the human eye,from the radio waves that carry your favorite songs,to the x-rays doctors use to see inside of you,to the microwaves that heat up your food.In order to understandhow these can all be light,we'll need to know a thing or twoabout what light is.Light is electromagnetic radiationthat acts like both a wave and a particle.Light waves are kind of like waves on the ocean.There are big wav...