Question

There are certain material developed in laboratories which have a negative refractive index. A ray incident from air (medium $1$) into such a medium (medium $2$) shall follow a path given by

• A.
• B.
• C.
• D.

Answer 1

Answer: (A)

Using Snell's law
$\mu =\frac{sini}{sinr}$
$\Rightarrow sinr=\frac{sini}{\mu }$
According to question, $\mu$ is negative
$\therefore sinr$ is negative.
Hence, $r$ is negative.