Polarisation Definition and 122 Threads

Homework Statement "Polarisation" is defined as the cofinement of the vibrations of the wave in only one plane and the removal of the vibrations in the other perpendicualar plane of the electromagnetic wave. But the e.m. wave is defined as a wave in which the electic vetors are restricted...

Hi all. Usually we have worked with electromagnetic waves linearly polarized along the z-direction (or x or y for that matter). Is it possible to have an E.M. wave, which is just polarized along some arbitrary direction r = (x, y, z)T? Or does it necessarily have to be circular or in x, y...

In a textbook on wireless communications that I am reading, the author states that transmissions from a vertically polarised antenna will undergo interactions which would cause energy to leak into the orthogonal polarisation component (Im assuming the H-field of an EM wave) before reaching the...

Does it removes either the electric wave of magnetic wave component of the EM wave? And if so, won't the wave exiting the polariser not a EM wave anymore? More like an E wave or M wave. If the above argument is correct, won't the speed of light become\frac{1}{\sqrt{\epsilon_{0}}} or...

Why is only electric field considered when we discuss the phenomenon of polarisation ? What about the magnetic field ?

I think I understand how polarised light is used to light up an LCD screen. The polarised light twists as it passes through the LCD, then goes through another polaroid filter which allows twisted light through to light up the display - unless there's a current in the electrodes, which means that...

Homework Statement When a uniform electric field is applied to diamond, the induced dipole moment per unit volume (ie. polarisation) is P_{0} = 1.5 \times 10^{-7} \text{C m}^{-2}. Given that the density of diamond is 3500 \text{kg m}^{-3}, 1 kmole of diamond has a mass of 12kg. Avogadro's...

Hi When light is polarised in only one plane, I am right in thinking that in fact: The eletric field oscillates in only one plane. The magnetic field oscillates in only one plane, perpendicular to the plane of the electric field? So in fact in plane polarised light, oscillations still...

May I know what does polarization direction for linearly polarized plane waves mean? In general, does the polarization direction the same as E-field direction?

Hi, I have been spending the last week just to understand the meaning of polarisation of light. I think the books so I far I have seen are not following simple language and are making things complex or I have not seen so far a good book on this subject which simplified the things or perhaps...

Homework Statement Unpolarised light is shone onto a set of three transmission Polaroid sheets. The intensity of light after the first Polaroid sheet is measured to be I = E2. The transmission axis of the second and third Polaroid sheets are at angles of alpha and beta with respect to the...

I am trying to answer a question that states: There is a sphere of radius R centred at the origin with a polarisation P = C(xi+yi+zk), where C is a constant, at the surface. What is the total charge in the sphere if there is no net charge? I know that P= Nqd where N is the number of...

I have an a-level exam tomorrow which is really important in deciding whether I can get into uni or not. So basically I am having a panic moment. Could you PLEASE tell me how you polarize electro-magnetic waves? What is the effect of polarization? Why do we polarize waves? How can you tell if a...

With a combination of wave plates in the order \lambda/2 - \lambda/4 - \lambda/2 it should be possible to achieve any polarisation. But I don't understand why: the first wave plate switches the polarisation direction, the second changes linear to circular polarisation and vice versa, and the...

an electromagnetic wave contists of an electric field and a magnetic field oscillating perpendicularly to each other and to the direction of propagation. also, a polariser only let's through light of one particular orientation, so if the polariser is parallel to the direction of the oscillation...

can anyone point me in the right direction to somewhere i can find out about sigma polarisation. i want to know how it is defined. thanks

How does polarisation of light work exactly and what does dextrorotary and laevorotary mean please help :smile:

Polarisation of light... With light, the elctric and magnetic fields are perpendicular to the direction of wave travel - but my textbook says that these also exist in every plane, forming almost like a cylinder. This is what means it can be polarised. But what causes this? ie - what are the...

hi, i have a question about polarisation of light. how can you tell if light is polarized, unpolarized or partially polarized ? hope someone can answer this for me please! :D thanx

is fermonic spin the same as polarisation of a particle? example of what i mean. When light is reflected it comes partly polarised right? this means only some photons are reflected along a certain plane. does this difference in polarisation affect the way the particles interact with other...

can someone explain to me the difference between spin and polarisation?? someone told me they were the same thing and now I am getting confussed. :confused: Tom

In what manner can an electron be said to be helically polarised? :confused: I have heard of spin-polarisation, but that should be strictly up or down shouldn't it?