There are certain materials developed in laboratories that have a negative refractive index (figure). A ray incident from the air (medium-1) into such a medium (medium-2) shall follow a path given by:
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2. |  |
| 3. |  |
4. |  |
(1) Hint: The bending of the ray depends on the refractive index.
The negative refractive index metamaterials are those in which incident ray from the air (Medium 1) refracts or bends differently from that of positive refractive index medium.
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