A light ray is incident perpendicular to a face of a 90∘ prism and is totally internally reflected at the glass – air interface. If the angle of reflection is 45∘, what can be concluded about the refractive index n?

A light ray is incident perpendicular to a face of a 90∘ prism and i

1.	A light ray is incident perpendicular to a face of a 90∘ prism and is totally internally reflected at the glass – air interface. If the angle of reflection is 45∘, what can be concluded about the refractive index n?
Answer» A light ray is incident perpendicular to a face of a $90^{\circ}$ prism and is totally internally reflected at the glass – air interface. If the angle of reflection is $45^{\circ}$ , what can be concluded about the refractive index n?

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A light ray is incident perpendicular to a face of a 90∘ prism and is totally internally reflected at the glass – air interface. If the angle of reflection is 45∘, what can be concluded about the refractive index n?

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