Polarisation :-
When medium one (plate 1) allows only those vibrations
to pass through it, which are parallel to its axis. Hence when they emerge out
of the crystal they vibrates in only one direction. Thus light is said to be
linearly polarised because it has achieved the property of one-sidedness with
respect to direction of incident radiations. This phenomenon is called Polarisation.
Polarisation Of Light :-
The phenomenon
of restriction of the vibrations of light waves in a particular plane perpendicular
to the direction of propagation of wave motion is called polarization of
light.
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Plane Polarised Light :-
When the vibrations of the electric light vectors are confined in one
plane, the light is called Plane polarized light. This direction is
perpendicular to the direction of propagation.
a) Plane polarised light with vibrations
perpendicular to plane of paper
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b)
Plane
polarised light containing changing electric
vector
perpendicular to direction of propagation, only in one plane
Plane of vibration :- The
plane in which the vibrations of polarised light take place is called as plane
of vibration.
Plane of Polarisation :-
The plane perpendicular to the plane of
vibration in which there are no vibration of polarised light is called plane of
polarization.
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