Optics Question 287

Question: If $ \overrightarrow{E} $ and $ \overrightarrow{B} $ are the electric and magnetic field vectors of E.M. waves then the direction of propagation of E.M. wave is along the direction of

[CBSE PMT 1992, 2002; DCE 2002, 05]

Options:

A) $ \overrightarrow{E} $

B) $ \overrightarrow{B} $

C) $ \overrightarrow{E}\times \overrightarrow{B} $

D) None of these

Show Answer

Answer:

Correct Answer: C

Solution:

EM waves travels with perpendicular to E and B. Which are also perpendicular to each other $ \vec{v}=\vec{E}\times \vec{B} $



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