MCQ
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$\sqrt{\frac{\varepsilon_0}{\mu_0}}$
- ✓$\frac{1}{\sqrt{\mu_0 \varepsilon_0}}$
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The magnitude of electric field intensity at a distance $R ( R \gg L )$ varies as :
Reason : Plane mirror forms virtual image, if object is real.
