Which statement about electromagnetic waves is correct?
AThey require a material medium for propagation
BThey are formed by changing electric and magnetic fields inducing each other
CThey can travel only through homogeneous media
DThey are a kind of mechanical disturbance in matter only
Answer & Solution
Correct answer: B. They are formed by changing electric and magnetic fields inducing each other
Electromagnetic waves consist of changing electric and magnetic fields that induce each other. They do not require a material medium, so options A and D are incorrect, and they are not limited to homogeneous media.
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