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Snell’s Law

Snell’s Law. The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant : The incident ray and refracted ray are on opposite sides of the normal at the point of incidence. From the above law, we get the general equation :

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Snell’s Law

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  1. Snell’s Law

  2. The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant: • The incident ray and refracted ray are on opposite sides of the normal at the point of incidence.

  3. From the above law, we get the general equation: • The subscript 1 indicates the incident medium and subscript 2 is the refracting medium.

  4. Example • Light travels from glass into air. The angle of refraction in air is 60. What is the angle of incidence in glass?

  5. Lab • Have fun and learn!

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