Question

Polarization of light wave means that polarized wave contains vibration in only one plane. So, When an electromagnetic wave is polarized then it has vibation in z-axis (say).

An electromagnetic wave contains electric and magnetic filed perpendicular to each other. so, if electric field is in the plane parallel to the slit of polarid then magnetic field is there in the polarized wave or not.

Answer 1

We know that if we pass an unpolarized light through polarizer then we get a polarized light. It means we have electric field as well as magnetic field vibrating perpendicular to each other as well as perpendicular to the direction.

So, i think that from polarizer only electric field or mangetic field can pass since both are perpendicular to each other

Answer 2

when visible light is polarized,we still get visible light..so both E and B fields must be there..

Answer 3

Only one direction of an electric field is allowed through the polarizer. Since an electromagnetic wave is just a continual changing electric field creating a changing magnetic field creating an electric field, the electric field that is allowed to pass through the polarizer simply creates another magnetic field and the wave keeps travelling onwards as normal while the others aren't.

Answer 4

I guess traditionally they deal only with Electric field...

Answer 5

@ujjwal If only electric filed gets passed then we don't get light as output from polarid. Since light constitutes of electric field as well as magnetic field.

KAINUI's answer is satisfying to me.

Answer 6

Why we only choose the electric field parallel to the Polaroid come out of the polaroid not the magnetic field.

Answer 7

I meant to say, the electric field is polarized in a a particular plane and there is always a magnetic field in a plane parallel to it..

When they polarize the light, they actually polarize the electric field in a plane... And of course there has to be magnetic field perpendicular to it..
I didn't mean that they separate the magnetic field from it..
Light polarized in a particular plane means electric field polarized in that plane..

It is the plane of electric field which is taken into account..

Answer 8

It's true that polarized light travels in a single plane. And it must contain both electric and magnetic field, perpendicular to each other. Take electric field along the x-axis, then the magnetic field is along the y-axis. But both still lie in the same xy plane.

Answer 9

@Mani_Jha I don't think that both electric and magnetic field can lie in the same plane.. And what do you mean when you say the electric field is along x axis and magnetic field is along Y axis? Can you draw a diagram?

Answer 10

Is this not possible?