Question: Q. 8. Do electromagnetic waves carry energy and momentum?
U [O.D. I 2017]
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Solution:
Ans. Yes.
[CBSE Marking Scheme 2017]
Detailed Answer :
EM waves carry energy and momentum without having mass and can exert pressure which is known as radiation pressure. These waves like other waves carry energy as they travel through empty space without which, it wouldn’t be able to heat or generate photo current in photo cells.
[AIQ. 9. Write the relation for the speed of electromagnetic waves in terms of the amplitudes of electric and magnetic fields.
U] [O.D. II 2017]
Ans. Speed of electromagnetic wave, $c=\frac{E_{0}}{B_{0}}$
[CBSE Marking Scheme 2017]
