magnitude and direction of electric field

Discussion in 'Homework Help' started by smarch, Jul 3, 2010.

  1. smarch

    Thread Starter Active Member

    Mar 14, 2009
    52
    0
    Can someone help me with the question attached as a JPEG to this post.

    Am I correct to say that I have to use the formula :

    ε1E1cosα = ε2E2cosβ
    And then make β the subject to work out the direction?
    And make E2 the subject to find the magnitude?


    Any help will be appreciated, thanks.
     
    • q19.JPG
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  2. smarch

    Thread Starter Active Member

    Mar 14, 2009
    52
    0
    Anyone? please.
     
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