COMEDK · Physics · 24. Electromagnetic Waves
The electric and magnetic fields associated with an electromagnetic wave propagating along \(+z\) axis, can be represented by
- A \(E=E_0 i, \quad B=B_0 j\)
- B \(E=E_0 i, \quad B=B_0 k\)
- C \(E=E_0 k, \quad B=B_0 j\)
- D \(E=E_0 j, \quad B=B_0 k\)
Answer & Solution
Correct Answer
(A) \(E=E_0 i, \quad B=B_0 j\)
Step-by-step Solution
Detailed explanation
An electromagnetic wave propagates in the direction of the vector \(\vec{E} \times \vec{B}\). The direction of propagation is given as the \(+z\) axis, which corresponds to the unit vector \(\hat{k}\). We check the cross products for the given options: For option (FLnIo):…
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