Everypointonthiscurvehasanxcoordinate

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Unformatted text preview: lds oscillate together but in different planes. To visualize an electromagnetic wave, you must think in 3­D. Let’s put a light wave together one piece at a time. Above is a set of 3­D coordinate axes. The z ­axis is vertical, the y­axis is horizontal, and the x ­axis is coming out toward you. Electromagnetic Waves (cont.) The red wave represents an oscillating electric field in the y­z plane. (Every point on this curve has an x coordinate of zero.) It is a snapshot in time. At the crests and troughs, the electric field will exert the greatest force on a charge, but in opposite directions. Charges located at the y ­intercepts will experience no electric force (at this point in time). Electromagnetic Waves (cont.) In the top right picture, the blue wave represents an oscillating magnetic field in the x­y plane. (Every point on this curve has an z coordinate of zero.) It is a snapshot in time. Like the electric field, the magnetic field is strongest at the crests and troughs. Bottom right is shown an electric and a magnetic field oscillating together. This is an electro­ m...
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