(Answered) A light ray is traveling from glass refractive index 154

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A light ray is traveling from glass (refractive index 1.54) into air (refractive index 1.00) at an angle of incidence of 45 degrees as shown.

Calculate the critical angle for the light going from glass to air.

Show on a ray diagram what happens to the ray after it hits the interface.

Show also on a diagram the path of a ray incident in glass at 40 degrees.

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