University Physics with Modern Physics Technology Update, Volume 2 (CHS. 21-37)
University Physics with Modern Physics Technology Update, Volume 2 (CHS. 21-37)
13th Edition
ISBN: 9780321898098
Author: Hugh D. Young
Publisher: PEARSON
Question
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Chapter 32, Problem 1DQ
To determine

The direction of electromagnetic wave by measuring electric and magnetic fields.

Expert Solution & Answer
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Explanation of Solution

The propagation direction of electromagnetic wave is perpendicular to vectors of electric filed and magnetic field.

Assume direction of electric filed and magnetic field can be found at a point in a space. The direction of propagation wave can be found by taking cross product of electric filed and magnetic field (E×B)

University Physics with Modern Physics Technology Update, Volume 2 (CHS. 21-37), Chapter 32, Problem 1DQ

From figure 1, electromagnetic wave direction is perpendicular to the vectors of electric filed and the magnetic field. Therefore, direction of electromagnetic wave is opposite to direction of (E×B).

Conclusion:

Therefore, direction of electromagnetic wave is opposite to direction of (E×B).

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