A Plane Electronmagnetic Wave Is Travelling in the Positive X

question 59

Multiple Choice

A plane electronmagnetic wave is travelling in the positive x direction. At the instant shown the electric field at the extremely narrow dashed rectangle is in the negative z direction and its magnitude is decreasing. Which diagram correctly shows the directions and relative magnitudes of the electric field at the edges of the rectangle?

• A) A
• B) B
• C) C
• D) D
• E) E

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