Q 12-09-023NEETJEE MainEasy
A glass slab $6$ cm thick ($\mu = 1.5$) is placed over a mark on paper. When viewed from above, the mark appears to be raised by
Answer: (B) $2$ cm
Apparent depth $= \dfrac{6}{1.5} = 4$ cm, so the shift is $6 - 4 = 2$ cm. (In general $t\left(1 - \dfrac{1}{\mu}\right)$.)
Solution by Sreeraj P, M.Sc Physics