Question

A glass block 3.0 cm thick is placed over a stamp. Calculate the height through which the image of the stamp is raised. Refractive index of glass is 1.54.

Answer 1

\[ {}^{a}\mu_{g} = \frac{\text{Real depth}}{\text{Apparent depth}}\]

\[{}^{a}\mu_{g} = \frac{3.0 \ \text{cm}}{\text{Apparent depth}}\]

\[ \therefore \ \text{Apparent depth} = \frac{3.0}{1.54} \]

= 1.94 cm

∴ Height through which image is raised = (3 − 1.94) = 1.06 cm