JEE Main 2026 Physics question
For an electromagnetic wave propagating through vacuum, k⃗, E⃗ and ω represent propagation vector, electric field and angular frequency, respectively. The magnetic field associated with this wave is represented by:
Answer: (B)
Solution
The wave travels along E⃗×B⃗, so B⃗=(k̂×E⃗)/c. With c=ω/k this is B⃗=(k⃗×E⃗)/ω.