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Question: Answered & Verified by Expert
An electromagnetic wave is propagating along the +z-axis. Direction of electric and the magnetic field of this wave can be represented by
PhysicsElectromagnetic WavesNEET
Options:
  • A E=E0i^,  B=B0j^
  • B E=E0k^,  B=B0i^
  • C E=E0j^,  B=B0i^
  • D E=E0j^,  B=B0k^
Solution:
1316 Upvotes Verified Answer
The correct answer is: E=E0i^,  B=B0j^
The electromagnetic wave is propagating along the +z axis.
Since the electric and magnetic fields are perpendicular to each other and also perpendicular to the direction of propagation of wave.

Also, E × B  gives the direction of wave propagation.

E = E 0 i ^ , B = B 0 j ^ i ^ × j ^ = k ^

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