Wednesday 21 March 2012
Glass!
Glass is opaque because the electrons are very tightly packed and photons of a visible light wavelength (400-700nm) don't carry enough energy to cause an electron to "jump" to a different energy level. An "Energy Gap" is the difference between certain energy levels. So because the photon doesn't have enough energy to affect the electron, it isn't absorbed and instead passes straight through the glass! Letting the "light" in! Harmful UV rays are kept out, don't worry.
Adam King
21/03/12
Tuesday 20 March 2012
Pink Light
We do not see pink light as it doesn't naturally exist - confused??
Pink light has no place on the Electromagnetic Spectrum but our eyes are clever, very clever and they use red and blue light to make.......PINK. If you were to roll visible light around a wheel then red and blue would end up touching each other - this is where the pink magic happens......
The wavelengths that we struggle to see are "made" into pink via combining red and blue light.
Adam King
20/03/12
Pink light has no place on the Electromagnetic Spectrum but our eyes are clever, very clever and they use red and blue light to make.......PINK. If you were to roll visible light around a wheel then red and blue would end up touching each other - this is where the pink magic happens......
The wavelengths that we struggle to see are "made" into pink via combining red and blue light.
Adam King
20/03/12
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