Question

The oscillating electric and magnetic vectors of an electromagnetic wave are oriented along

• A. the same direction but have a phase difference of $90^{\circ }$
• B. the same direction and are in same phase
• C. mutually perpendicular directions and are in same phase
• D. mutually perpendicular directions but has a phase difference of $90^{\circ }$

Answer 1

Answer: (C)

In an electromagnetic wave, the oscillating electric and magnetic fields are mutually perpendicular and also perpendicular to the direction of wave propagation
$\frac{E}{B}=c$
ie, $E$ and $B$ are in same phase.