HW10c - GenericStudent Homework 10 savrasov 39823 Jan 02,...

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GenericStudent – Homework 10 – savrasov – 39823 – Jan 02, 2008 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. The due time is Central time. 001 (part 1 oF 2) 1 points The magnetic feld amplitude oF an electro- magnetic wave is 4 × 10 - 6 T. The speed oF light is 2 . 99792 × 10 8 m / s . Calculate the amplitude oF the electric feld iF the wave is traveling in Free space. Correct answer: 1199 . 17 N / C. Explanation: Let : c = 2 . 99792 × 10 8 m / s and B = 4 × 10 - 6 T . According to Maxwell’s equations For an electromagnetic wave in vacuum the relation between the amplitude oF the magnetic feld and the amplitude oF the electric feld must be E = cB = (2 . 99792 × 10 8 m / s) (4 × 10 - 6 T) = 1199 . 17 N / C . The same relation applies even when the ve- locity oF light in the medium is not c , in general, E = v B where v is the velocity oF light in that medium.
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This note was uploaded on 01/10/2010 for the course PHY na taught by Professor Richardscalettar during the Winter '09 term at UC Davis.

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HW10c - GenericStudent Homework 10 savrasov 39823 Jan 02,...

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