AP EAMCET · PHYSICS · Electromagnetic Waves
Light is an electromagnetic wave. Its speed in vacuum is given by the expression
- A \(\sqrt{\mu_0 \varepsilon_0}\)
- B \(\sqrt{\frac{\mu_0}{\varepsilon_0}}\)
- C \(\sqrt{\frac{\varepsilon_0}{\mu_0}}\)
- D \(\frac{1}{\sqrt{\mu_0 \varepsilon_0}}\)
Answer & Solution
Correct Answer
(D) \(\frac{1}{\sqrt{\mu_0 \varepsilon_0}}\)
Step-by-step Solution
Detailed explanation
Speed of light (EM wave) in vacuum or air is given as \(c=\frac{1}{\sqrt{\mu_0 \varepsilon_0}}\) where, \(\mu_0=\) permeability of free space and \(\quad \varepsilon_0=\) permittivity of free space.
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