How chirality helps in polarsing?

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    Chirality
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Chirality refers to molecules whose mirror images cannot be superimposed, leading to optical activity where these molecules rotate the plane of polarized light. The key to this rotation lies in the unsymmetrical structure of chiral molecules, which interacts differently with light depending on its orientation. This interaction results in a measurable change in the plane of polarization. For further understanding, resources like Chemguide and Wikipedia provide detailed explanations of the underlying principles of optical activity and chirality.
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I have learned that molecules whose mirror images are not superimposable are chiral and it rotates the plane of polarisation by some degrees. But i don't understand how
How does unsymmetry help in rotating the plane of polarisation?
 
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The wikipedia page seems to offer quite a good explanation of what's going on: http://en.wikipedia.org/wiki/Optical_activity#Theory

I'm not sure what your level of current knowledge is, so if you have any trouble understanding that I'll be happy to explain it as best I can :)
 

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