Question

9. The plane in which the magnetic field vector of plane polarised light vibrates is known as
(A) Plane of vibration
(B) Plane of Polarisation
(C) Principal Plane
(D) None of above​

Answer 1

Principal plane

Hope it's help you

Answer 2

Answer:

The plane of vibration, containing both electric vectors (E & D) and both propagation vectors, is sometimes called the "plane of polarization" by modern authors. Fresnel's "plane of polarization", traditionally used in optics, is the plane containing the magnetic vectors (B & H) and the wave-normal.