An equilateral glass prism is made of material of refrative index 1.500. Find its angle of minimum deviation.

An equilateral glass prism is made of material of refrative index 1.50

1.	An equilateral glass prism is made of material of refrative index 1.500. Find its angle of minimum deviation.
Answer» Solution :`A=60^@,MU=1.5, delta_(MIN)=?` Substituting in `mu=(sin((A+delta_(min))/2))/sin(A/2)` `1.5=(sin(60^@+delta_(min))/2)/((sin 60^@/2))` `1.5 sin 30^@ = sin ((60^@+ delta_(min))/2)` `sin((60^@+ delta_(min))/2)=1.5 times0.5000=0.7500` `(60^@+delta_(min))/2=48^@35.` `60^@+ delta_(min)= 97^@10 implies delta_(min)=37^@.10`