Question

can anyone please solve this...

Answer 1

As

Refractive index(n) = (sin( (A + angle of minimum deviation)/2) /(sinA/2)

So angle is small ..so refractive index(n)

= (A + angle of minimum deviation)/A

A:-Angle of prism

Here angle of deviation is 10° and

n = 1.5

So, 1.5= (A + 10°)/A

You will get A=20°