Question

Refractive index of the glass slab is `1.5.` There is a point object `O` inside the slab as shown. To eye`E_1` object appears at a distance of `6cm` (From the top surface) and to eye `E_2` it appears at a distance of `8cm` (from the bottom surface). Find thickness of teh glass slab.

Answer 1

Correct Answer - A::B::C
Applying `d_(app)=d/mu `
`d=(mu)d_(app) `
`:. d_1=(1.5)(6)=9`cm
` d_2=(1.5)(8)=12`cm
Therefore, actual thickness of the glass slab is `d_1+d_2=21`cm