Question

The value equal to the velocity of light in vacuum is

• A. $ \frac{\sqrt{\mu _{0}}}{\varepsilon _{0}}$
• B. $ \frac{1}{\sqrt{\mu _{0}\varepsilon _{0}}}$
• C. $ \sqrt{\mu _{0}\,\varepsilon _{0}}$
• D. $ \sqrt{\frac{\mu _{0}}{\,\varepsilon _{0}}}$

Answer 1

Answer: (B)

The velocity of light in vacuum is given by
$c=\frac{1}{\sqrt{\mu_{0} \varepsilon_{0}}}$
where $\mu_{0}$ and $\varepsilon_{0}$ are respectively the absolute permeability and absolute permittivity of free space.