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Electromagnetic waves emanating from a p...

Electromagnetic waves emanating from a point A (in air) are incident on a rectangular block of material M and emerge from the other side as shown. The angles i and r are angles of incidence and refraction when the wave travels from air to the medium. Such paths for the rays are possible

A

If the material has a refractive index very nearly equal to zero

B

Only with gamma rays with a wavelength smaller than atomic nuclei of the material

C

If the material has a refractive index less than zero

D

If the material has a refractive index less than zero

Text Solution

Verified by Experts

The correct Answer is:
C
It is possible for negative `mu` only and materials are known as meta materials.
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