A ray of light in normally incident on one face of an equilateral glass prism . Answer the following
What is the angle of incidence on the firt face of the prism , what is the angle of refraction from the first face , what will be the angle of incidence at the second face , will the ray suffer minimum deviation .

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Solution

If a ray of light in normally incident on one face of an equilateral glass prism then
(i) Angle of incidence for first face of triangle is zero.
(ii) Angle of refraction is zero.
(iii) Angle of incidence on the second face is 60°.
(iv) The ray will not suffer minimum deviation.

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If a ray of light in normally incident on one face of an equilateral glass prism then(i) Angle of incidence for first face of triangle is zero.(ii) Angle of refraction is zero.(iii) Angle of incidence on the second face is 60°.(iv) The ray will not suffer minimum deviation.

If a ray of light in normally incident on one face of an equilateral glass prism then
(i) Angle of incidence for first face of triangle is zero.
(ii) Angle of refraction is zero.
(iii) Angle of incidence on the second face is 60°.
(iv) The ray will not suffer minimum deviation.