A small object is encased in an acrylic block $(n=1.5)$. The object appears to be $4.0 \mathrm{~cm}$ below the surface. What is the actual distance of the object below the surface?
A) $6.0 \mathrm{~cm}$
B) $2.0 \mathrm{~cm}$
C) $5.5 \mathrm{~cm}$
D) $2.7 \mathrm{~cm}$
E) $4.0 \mathrm{~cm}$

Question

Quizplus · Accepted Answer

The apparent depth is less than the actual depth by a factor of the index of refraction. So, the actual depth is $4.0 \mathrm{~cm} \times 1.5 = 6.0 \mathrm{~cm}$.

A Small Object Is Encased in an Acrylic Block (n=1.5)(n=1.5)(n=1.5) the Object Appears to Be

A Small Object Is Encased in an Acrylic Block $(n=1.5)$ the Object Appears to Be