A ray of light travelling inside a rectangular glass block of refractive index 2 is incident on the glass-air surface at an angle of incidence of 45°. Show that the ray will emerge into the air at an angle of refraction equal to 90°

A ray of light travelling inside a rectangular glass block of refracti

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A ray of light travelling inside a rectangular glass block of refractive index 2 is incident on the glass-air surface at an angle of incidence of 45°. Show that the ray will emerge into the air at an angle of refraction equal to 90°

A ray of light travelling inside a rectangular glass block of refractive index 2 is incident on the glass-air surface
at an angle of incidence of 45°. Show that the ray will emerge into the air at an angle of refraction equal to 90°

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