First slide

Nature of electromagnetic wave

Question

The equation of a plane polarised electromagnetic wave is given as E_y = E₀ sin(at - bx)

Moderate

A

Wave speed is a/b
B

The waves move along positive x-axis
C

y- z plane is the plane of polarisation.
D

All of these.

Solution

$E_{y} = E_{0} \sin (a t - b x)$
$ω = a; k = b$
$\frac{ω}{k} = v = \frac{a}{b}$
Option (2) and (3) are also correct.

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