JEE Main · PhysicsEasy
What is the ratio of the amplitude of the electric field to the amplitude of the magnetic field for an electromagnetic wave in a vacuum?
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: A —
Solution
- For an electromagnetic wave, the fields are related by .
- Taking magnitudes, we have .
- The ratio is .
- Hence the answer is (A).
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