Answer:
So, we know the formula angle of deviation (δ) = angle of prism (A)(1 – refractive index (μ))
⇒δ=A(1−μ)
We need to find the refractive index of water here.
It is given that δ=1 and A=3
On putting the values on above equation we get the value of equation as:
1=3(1−μ)μ=1−13=23=1.33
1.3333... IS THE RI OF WATER