Optics 7 Question 20
20. Choose the correct statement.
(a) The speed of light in the meta-material is $v=c|n|$
(b) The speed of light in the meta-material is $v=\frac{c}{|n|}$
(c) The speed of light in the meta-material is $v=c$
(d) The wavelength of the light in the meta-material $\left(\lambda _m\right)$ is given by $\lambda _m=\lambda _{\text {air }}|n|$, where $\lambda _{\text {air }}$ is the wavelength of the light in air.
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Solution:
- Since value of $n$ in meta-material is negative.
$$ \therefore \quad v=\frac{c}{|n|} $$
