The electric field vector \( \vec{E} \) and magnetic field vector \( \vec{B} \) in electromagnetic waves are:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → perpendicular to each other
Maxwell's equations fix the geometry of an electromagnetic wave: \( \vec{E} \), \( \vec{B} \) and the direction of propagation are mutually perpendicular.
Note: The same question was also asked in CUET (UG) 2026 on 19-05-2026 (Slot 1).
NCERT (2026-27):
Nature of Electromagnetic Waves – “It can be shown from Maxwell’s equations that electric and magnetic fields in an electromagnetic wave are perpendicular to each other, and to the direction of propagation.”