Question: Light is incident from air on a transparent substance at an angle of 58.0 o with the normal. The reflected and refracted rays are observed

Light is incident from air on a transparent substance at an angle of 58.0^o with the normal. The reflected and refracted rays are observed to be mutually perpendicular.

(a) What is the index of refraction of the transparent substance?

(b) What is the critical angle for total internal reflection in this substance?

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