Target Exam

CUET

Subject

Physics

Chapter

Electromagnetic Waves

Question:

The electric field of a plane electromagnetic wave in a medium is given by
$E = 100 \sin (300 z - 6 × 10^{10} t) V m^{-1}$
The velocity of the electromagnetic wave in this medium will be
(Given: c - speed of light in vacuum)

Options:

0.5 c

0.67 c

c

1.5 c

Correct Answer:

0.67 c

Explanation:

The correct answer is Option (2) → 0.67 c