mid3 58010 Fall14-solutions - Version 040 mid3 58010 Fall14...

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Version 040 – mid3 58010 Fall14 – yeazell – (58010)1Thisprint-outshouldhave9questions.Multiple-choice questions may continue onthe next column or page – find all choicesbefore answering.00110.0pointsConsider the electromagnetic wave shown inthe figure below.number of protons or neutrons?EBIn which direction is the wave propagatingand how are the amplitudesEandBrelated?For instance, let us choose the point wherethevectorEvector is along thexaxis, as shown inthe above figures. At this same instant, thevectorBvector is along the negativeyaxis (at a pointwith a phase difference of 360from the placeon the velocity (z) axis where thevectorEvector isdrawn).ThenvectorE×vectorBis along the negativezaxis.Therefore,theelectromagneticwaveistraveling to the right.00210.0pointsCan two different elements contain the samenumber of protons or neutrons?

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