ch26_print_1 - The Refraction of Light 1 – The Refraction...

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Unformatted text preview: The Refraction of Light 1 – The Refraction of Light • When a ray of light traveling through a transparent medium encounters a boundary leading into another transparent medium, part of the light is reflected and part enters the second medium. • The ray that enters the second medium is bent at the boundary. It is said to be refracted . • The angle of refraction, θ 2 , is related to the incident angle, θ 1 , as follows sin θ 2 sin θ 1 = v 2 v 1 (1) where v 1 is the speed of light in medium 1, and v 2 is the speed of light in medium 2 ( Snell’s law ). Dr.D.Wackeroth Spring 2005 PHY102A The Refraction of Light • It is convenient to define the index of refraction of a medium: n = c v (2) where c is the speed of light in vacuum and v is the speed of light in the medium. n > 1 , since the speed of light in a medium is always less than that in vacuum (vacuum: n = 1 ). • When light travels from one medium to another its frequency does not change , but the wavelength does ( λ =...
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This note was uploaded on 02/12/2012 for the course PHYSICS 104 taught by Professor Staff during the Fall '10 term at Rutgers.

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ch26_print_1 - The Refraction of Light 1 – The Refraction...

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