Question

if the refracting angle of prism is 60 and minimum deviation is 30 the angle of incidence will be

Answer 1

we know that,
A+d=i1+i2
and at angle of minimum deviation ,i1 and i2 are equal,
therefore the equation becomes,
A+d=2i1
60+30=2i1
90=2i1
i1=45
therefore angle of incidence is equals to 45 degree.