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  • basic waves electromagnetic question

    From Grant Weasner@1:2320/100 to All on Thu Feb 23 16:53:33 2017
    There is a diagram online and in books all over. The diagram show direction
    and magnetic wave oscillating perpendicular along the wave.

    Does that magnetic field change polarity between min and max of the light
    wave amplitude?

    In this diagram it shows the magnetic field shift sides along the wave.

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  • From Tony Langdon@1:2320/100 to Grant Weasner on Thu Feb 23 16:13:00 2017
    Grant Weasner wrote to All <=-

    There is a diagram online and in books all over. The diagram show direction and magnetic wave oscillating perpendicular along the wave.

    Does that magnetic field change polarity between min and max of the
    light wave amplitude?

    Both the electric and magnetic fields reverse polarity every half cycle.


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  • From Grant Weasner@1:2320/100 to Tony Langdon on Sat Mar 4 17:55:18 2017
    Thank you Tony.

    I was asking my course mentors and they said it doesn't but looking at the diagrams it seems to do that. Even the lines in the diagram show direction change, which in all magnetic field diagrams the line of force are
    directional.

    I was thinking the polarity .. could be the cause of defraction for obsticals smaller than the wave length. The polarity and charge oscilation defracts on like charge or magnetic field as the wave (photon) passes near field forces.

    Then I thought more probably does happen but it doesn't explain why the
    longer wave lengths wouldn't defract consistently near a like charge, or even attracted to a opposite charge.

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  • From Tony Langdon@1:2320/100 to Grant Weasner on Sun Mar 5 12:14:00 2017
    Grant Weasner wrote to Tony Langdon <=-

    I was asking my course mentors and they said it doesn't but looking at
    the diagrams it seems to do that. Even the lines in the diagram show direction change, which in all magnetic field diagrams the line of
    force are directional.

    It is the alternating electric field that maintains the alternating magnetic field and vice-versa, so both fields alternate, they are at right angles to each other, and both are at right angles to the direction of propagation.

    I was thinking the polarity .. could be the cause of defraction for obsticals smaller than the wave length. The polarity and charge
    oscilation defracts on like charge or magnetic field as the wave
    (photon) passes near field forces.

    You talking about diffraction?

    Then I thought more probably does happen but it doesn't explain why the longer wave lengths wouldn't defract consistently near a like charge,
    or even attracted to a opposite charge.

    The electric component of an EM wave is a field, not a charge. It will cause movement of charge (which is how many antennas pick up the energy on
    eceivers).


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  • From Grant Weasner@1:2320/100 to Tony Langdon on Fri Mar 10 17:58:16 2017
    You talking about diffraction?

    Yeah I was but I'm a terrible speller, its a curse.

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  • From Tony Langdon@1:2320/100 to Grant Weasner on Fri Mar 10 20:55:00 2017
    Grant Weasner wrote to Tony Langdon <=-

    You talking about diffraction?

    Yeah I was but I'm a terrible speller, its a curse.

    Just checking that we're on the same page. :)


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