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Different colors of light are defined by their wavelengths. For example, pure green light has a wavelength between 520 and 565 nanometers. You can use filters to separate light into
http://www.ehow.com/info_10029515_green-light-refl...
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When the light is incident on the air/glass interface (or any interface) perpendicular to the interface it will not be refracted.
http://wiki.answers.com/Q/When_is_light_passing_th...
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Well in physics we know that when a wave crosses from one medium to another there is a change of speed. For all light rays, this change of speed is annotated by a change of direction
http://wiki.answers.com/Q/When_a_beam_of_light_pas...
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Because glass is transparent which means light can travel through it. Also because glass is clear. That's another science question answered by the Wizzo.
http://wiki.answers.com/Q/Why_light_can_pass_throu...
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