AP EAMCET202120 Aug 2021Morning ShiftPhysicsElectromagnetic WavesActual
The electric and the magnetic fields associated with an electromagnetic wave propagating along the Z- axis, can be represented by
Options
- AE → = E 0 ı ^ , B → = B 0 ȷ ^
- BE → = E 0 k ^ , B → = B 0 ı ^
- CE → = E 0 ȷ ^ , B → = B 0 ı ^
- DE → = E 0 ȷ ^ , B → = B 0 k ^
Correct answer
A. E → = E 0 ı ^ , B → = B 0 ȷ ^
Step-by-step solution
The electric field E →   and magnetic fields B →   are perpendicular to each other and also perpendicular to the direction of propagation of wave, so the direction of propagation of waves is the same as direction of E → × B → Now, given that an electromagnetic wave propagating along the Z- axis or k ^ Therefore, the E = E 0 i ^   and   B = B 0 j ^ because i ^ × j ^ = k ^