Question

A light ray is passing from medium $A$ to $B$ and $\frac{sini}{sinr}$ is greater than one. This implies:

• A. If light goes from medium A to medium B, it will bend towards the normal.
• B. If light goes from medium A to medium B, it will bend away from the normal.
• C. If light goes from medium A to medium B its speed reduces.
• D. If light goes from medium B to medium A its speed increases.

Answer 1

The correct option is A

If light goes from medium A to medium B, it will bend towards the normal.

According to Snell's law:
$\frac{sini}{sinr}=\frac{v_1}{v_2}.$
where $v_1$ = speed of light in medium A,
and $v_2$ = speed of light in medium B.
Hence, if the value is greater than 1, it implies $v_1>v_2.$
From the above, we can infer that medium $B$ is denser than medium $A$. So, if light travels from $A$ to $B$, it will bend towards the normal.