1. Tardigrade
  2. Question
  3. Physics
  4. A glass slab of thickness 3 cm and refractive index 3/2 is placed on ink mark on a piece of paper. For a person looking at the mark at a distance 5.0 cm above it, the distance of the mark will appear to be

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A glass slab of thickness $3 \,cm$ and refractive index $3/2$ is placed on ink mark on a piece of paper. For a person looking at the mark at a distance $5.0 \,cm$ above it, the distance of the mark will appear to be

Ray Optics and Optical Instruments

Solution:

The apparent depth of ink mark
$=\frac{\text { Real depth }}{\mu}=\frac{3}{3 / 2}=2 \,cm$
Thus person views mark at a distance $=2+2=4 \,cm$.