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Electromagnetic Waves question

2023 · 31 Jan · Shift 1 · Q72
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Electromagnetic Waves question

2023 · 31 Jan · Shift 1 · Q72

JEE MainPhysicsElectromagnetic WavesNumerical+4 / −1
In a medium the speed of light wave decreases to 0.20.20.2 times to its speed in free space The ratio of relative permittivity to the refractive index of the medium is x:1x: 1x:1. The value of xxx is ‾\underline{\hspace{2cm}}​. (Given speed of light in free space =3×108 m s−1=3 \times 10^{8} \mathrm{~m} \mathrm{~s}^{-1}=3×108 m s−1 and for the given medium μr=1\mu_{\mathrm{r}}=1μr​=1)
Numerical answer
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