#### A thin prism of glass is placed in air and water successively. If μg = 3/2 and μw = 4/3, then the ratio of deviations produced by the prism for a small angle of incidence when placed in air and water is : Option 1) 9:8 Option 2) 4:3 Option 3) 3:4 Option 4) 4:1

Deviation from thin prism -

- wherein

Applicable when A is very small

( i.e. thin prism )

(for thin prism)

in air ,  ----------------------(1)

in water

Option 1)

9:8

Incorrect

Option 2)

4:3

Incorrect

Option 3)

3:4

Incorrect

Option 4)

4:1

Correct