Question

Choose the correct option with the help of ray diagram.
[${\mu }_1$ and ${\mu }_2$ are the refractive indices of the two mediums]

• A. ${\mu }_1>{\mu }_2$
• B. ${\mu }_1<{\mu }_2$
• C. ${\mu }_1={\mu }_2$
• D. Cannot be determined

Answer 1

The correct option is B ${\mu }_1<{\mu }_2$


From the figure,
$i>r$
which means, ray bends towards the normal.

If a light ray travels from a rarer medium to a denser medium, its speed decreases, and it bends towards the normal.
So, we can say ${\mu }_2>{\mu }_1$

Hence, option $\left(b\right)$ is correct.