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)

Answer 2

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