Usually when I don't know what something is, I look it up, then I

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Discussion Overview

The discussion centers around the concept of light polarization, specifically the differences between polarized and non-polarized light. Participants explore the nature of light as a wave, the properties of photons, and the implications of polarization in real-life scenarios, including the phenomenon of rainbows. The conversation includes both theoretical and conceptual aspects.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants describe polarized light as light where the electric field oscillates in a single plane, while non-polarized light has fields oscillating in random directions.
  • There is a question about how photons of polarized light differ from those of non-polarized light, with suggestions that they interact differently with electric and magnetic fields.
  • One participant proposes that the term "unpolarized" might be better described as "randomly polarized," emphasizing that polarization is a statistical property.
  • Another participant provides an analogy using waves on a rope to illustrate different types of polarization, such as vertical, horizontal, and circular polarization.
  • Some participants express frustration with the technical nature of existing explanations and suggest that a deeper understanding of the mathematics may be necessary to grasp the concept fully.

Areas of Agreement / Disagreement

Participants express a range of views on the nature of polarization, with some agreeing on basic definitions while others emphasize the complexity and statistical nature of the concept. The discussion remains unresolved regarding the best way to explain polarization in non-technical terms.

Contextual Notes

Some participants note that light is generally "partially polarized" and that complete or random polarization can occur under specific conditions. There is also mention of the limitations of non-mathematical explanations in conveying the concept effectively.

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Usually when I don't know what something is, I look it up, then I kinda get it.
But I have no clue what the polarization of light is. All of the articles don't bother to explain it, or are too technical.

In REAL LIFE (not mathematically) what is the different between polarized light, and non-polarized light?

Related: I heard that rainbows are polarized. What would happen if you were to look at one through a polarized film?
 
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light is a wave in which the amplitude of the electric and magnetic fields vary in space and time. when the oscillations remain in a single plane (i.e., the E field oscillates in the x-plane, the B field in the y-plane, and the waves propagate in the z-plane), the light is said to be plane polarized. most natural light is not plane polarized. the E and B fields can rotate around the direction of propagation, always remaining perpendicular to each other but not always in the same xy-orientation.
 


uby said:
light is a wave in which the amplitude of the electric and magnetic fields vary in space and time. when the oscillations remain in a single plane (i.e., the E field oscillates in the x-plane, the B field in the y-plane, and the waves propagate in the z-plane), the light is said to be plane polarized. most natural light is not plane polarized. the E and B fields can rotate around the direction of propagation, always remaining perpendicular to each other but not always in the same xy-orientation.

What property is different about the photons in polarized light? If I had a photon of polarized light, and one of non-polarized light, how would they differ?
 


nhmllr said:
What property is different about the photons in polarized light? If I had a photon of polarized light, and one of non-polarized light, how would they differ?

the simplest answer is that they would differ in how they interact with other E and B fields. polarization filters are the perfect example of this.
 


nhmllr said:
What property is different about the photons in polarized light? If I had a photon of polarized light, and one of non-polarized light, how would they differ?

I BELIEVE that plarized light is simply light that most of its photons have their fields oriented in the same way. Non polarized light is just a mix of random directions. I'll have to look some stuff up as well, as I am not sure that is 100% correct.

I'm not sure, but this article might help, but i didn't really understand it myself. I'll try rereading it a few times and see what happens.
http://en.wikipedia.org/wiki/Photon_polarization
 


Drakkith said:
I BELIEVE that plarized light is simply light that most of its photons have their fields oriented in the same way. Non polarized light is just a mix of random directions. I'll have to look some stuff up as well, as I am not sure that is 100% correct.

I'm not sure, but this article might help, but i didn't really understand it myself. I'll try rereading it a few times and see what happens.
http://en.wikipedia.org/wiki/Photon_polarization

Ooh, this article is much better than the other one on Wikipedia entitled "Polarization." I kinda get it now, because I watched a lecture on YouTube about rainbows/sunsets.

(Here it is if you are curious )
 
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nhmllr said:
Usually when I don't know what something is, I look it up, then I kinda get it.
But I have no clue what the polarization of light is. All of the articles don't bother to explain it, or are too technical.

In REAL LIFE (not mathematically) what is the different between polarized light, and non-polarized light?

Related: I heard that rainbows are polarized. What would happen if you were to look at one through a polarized film?

myadav1 said:
Usually when I don't know what something is, I look it up, then I kinda get it.
But I have no clue what the polarization of light is. All of the articles don't bother to explain it, or are too technical.

In REAL LIFE (not mathematically) what is the different between polarized light, and non-polarized light?

Odd...

In any case, maybe it would be more helpful to stop using the term "unpolarized" and instead use "randomly polarized". Polarization is a *statistical* property of light- the specific property is the direction of the electric field. Light is most generally "partially polarized", and under special conditions can approach complete polarization or random polarization.

Rainbows are indeed partially polarized, as is light from the sky.
 


myadav1 said:
Usually when I don't know what something is, I look it up, then I kinda get it.
But I have no clue what the polarization of light is. All of the articles don't bother to explain it, or are too technical.

In REAL LIFE (not mathematically) what is the different between polarized light, and non-polarized light?

If you asked a shopkeeper why he charged you a certain amount and he couldn't justify it mathematically they you wouldn't accept the figure he gave you.
In the same way, you can't divorce Maths and Real Life, when Science is concerned.
It may be a bit unfair of you to say that the articles that you read "can't be bothered" to explain something and are "too technical". It may just not be possible to give a reasonable arm-waving explanation. If it's too technical, then it may well be up to you to increase your knowledge until the explanation is understandable to you. Why do you think that Scientific advances need very clever people to make them?
 


Consider light as a wave. Vertically polarized light has an electric field waving up and down. Horizontally polarized light has an electric field waving left and right. Diagonally polarized light is some fraction of vertically polarized and some fraction of horizontally. Circularly polarized light is an electric field waving in a circle.

For a simple analogy, connect a rope to the wall. You can send waves down the rope by waving up and down. Or left and right. Or in a circular motion (either clockwise or counterclockwise. It's really simple.
 
  • #10


Khashishi said:
Consider light as a wave. Vertically polarized light has an electric field waving up and down. Horizontally polarized light has an electric field waving left and right. Diagonally polarized light is some fraction of vertically polarized and some fraction of horizontally. Circularly polarized light is an electric field waving in a circle.

Yes - a much more fruitful approach. Once you have sorted that out, you might go on to discuss photons - if you really feel that you have to. Where there's duality, however, is it essential to analyse something both ways? One of the ways always gives an answer easier than the other and an answer is an answer.:wink:

ps. I like the "waving" :smile:
 

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