how to find angle of deviation
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1 . Light is deflected as it enters a material with refractive index > 1.
2 . A ray of light is deflected twice in a prism. The sum of these deflections is the deviation angle.
3 . When the entrance and exit angles are equal, the deviation angle of a ray passing through a prism will be a minimum.
2 . A ray of light is deflected twice in a prism. The sum of these deflections is the deviation angle.
3 . When the entrance and exit angles are equal, the deviation angle of a ray passing through a prism will be a minimum.
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