### Refraction: Angle of Rays

At what angle must a ray be incident as it passes from a material which has index of refraction 1.41 to a material with index of refraction of 1.16. in order that the wave should remain in the original material?

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At what angle must a ray be incident as it passes from a material which has index of refraction 1.41 to a material with index of refraction of 1.16. in order that the wave should remain in the original material?

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See attached file.

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See the attached file.