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For a prism of refracting angle 45° , u=1.5 for a light of certain wavelength.What should be the maximum angle of incidence for the ray so that no total internal reflection takes place for the emergent ray?

For a prism of refracting angle 45° , u=1.5 for a light of certain wavelength.What should be the maximum angle of 
incidence for the ray so that no total internal reflection takes place for the emergent ray?

Grade:11

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