Physics · Electromagnetic Waves
An electromagnetic wave travelling along the z-axis has an electric field vector E. Let k̂ be the unit vector along the direction of propagation. Which of the following conditions is always true?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The associated magnetic field is given as B = c(E × k̂)
- 2The electric field can be written as E = c(B × k̂)
- 3k̂ · E = 0 and k̂ · B = 0✓
- 4k̂ × E = 0 and k̂ × B = 0
Correct answer
k̂ · E = 0 and k̂ · B = 0
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