MHT CET20239 May 2023Evening ShiftPhysicsRay OpticsActual
A transparent glass cube of length 24 ~cm has a small air bubble trapped inside. When seen normally through one surface from air outside, its apparent distance is 10 ~cm from the surface. When seen normally from opposite surface, its apparent distance is 6 ~cm . The distance of the air bubble from first surface is
Options
- A15 ~cm
- B14 ~cm
- C12 ~cm
- D8 ~cm
Correct answer
A. 15 ~cm
Step-by-step solution
Given: Length of cube =12 ~cm array ll & = Real depth Apparent depth = l₁ ~h ₁ = 24-l₁ ~h ₂ & putting h ₁=10 ~cm and h ₂=6 ~cm into (i), we get & l₁ 10 = 24-l₁ 6 & 6 l₁=240-10 l₁ & 16 l₁=240 & l₁=15 ~cm array