Gujarati
Hindi
8.Electromagnetic waves
easy

Which of the following is $NOT$ true for electromagnetic waves ?

A

they consist of changing electric and magnetic fields

B

they travel at different speeds in vacuum, depending on their frequency

C

they transport energy

D

they transport momentum

Solution

Electromagnetic wave have constant velocity in a particular medium and it is independant of frequency and it is equal to $V =\sqrt{\frac{1}{\mu_0 \epsilon_0}}=3 \times 10^8\, m / s$

Standard 12
Physics

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