Mathematics · Electromagnetic Waves
A plane electromagnetic wave has a frequency of 2.0 × 1010 Hz and its energy density is 1.02 × 10-8 J m-3 in vacuum. The amplitude of the magnetic field of the wave is close to (take speed of light c = 3 × 108 m s-1 and permeability of free space μ0 = 4π × 10-7 T m A-1):
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1190 nT
- 2180 nT
- 3160 nT✓
- 4150 nT
Correct answer
160 nT
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