HELP urgently physics question

Discussion in 'Physics' started by the_coolest_, Mar 31, 2005.

  1. the_coolest_

    Thread Starter New Member

    Mar 31, 2005
    The wave eqn for a prticle in non conducting or free soace is given by Laplacian(E)=u*e*partial double derivative of (E) with respect to time
    where E is the electric field
    u,e are the permiability and permitivity of free space.

    Now my question is laplacian(X)=Divergence(Gradient of X)
    now X is a scalar Quantity here how can we take gradient of Electric Field E which is a vector quantity??

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