12th Class Physics Wave Optics / तरंग प्रकाशिकी Question Bank Wave Optics Conceptual Problems

  • question_answer
    Why does the electric field of e. m. wave determine the state of polarisation and not its magnetic field?

    Answer:

                    An e. m. wave exerts a much larger electric force on a slowly moving charged particle than the magnetic force. Optical phenomena can be explained by considering the interaction between the electric field vector of light and the matter through which it passes. So one can specify the state of polarisation by electric field vector only.


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