Physics - EM Waves Question with Solution | TestHub

Relation for velocity of light $(c)=\sqrt{\frac{1}{{\epsilon }_0{\mu }_0}}$ (where ${\epsilon }_0=$ permittivity constant equal to $8.85\times 10^{-12}\mathrm{F}/\mathrm{m}$ and ${\mu }_0=$ permeability constant equal to $1.26\times 10^{-6}\mathrm{H}/\mathrm{m}$. Numerically velocity of light $(c)=\sqrt{\frac{1}{{\epsilon }_0{\mu }_0}}$ $$=\sqrt{\frac{1}{\left(8.85\times 10^{-12}\right)\times \left(1.26\times 10^{-6}\right)}}\approx 3\times 10^8\mathrm{m}/\mathrm{s}\text{. }$$