Physics · Electromagnetic Waves
The dispersion relation for electromagnetic waves travelling in a plasma is given by ω2 = c2k2 + ωp2, where c and ωp are constants. In this plasma, the group velocity will be:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1proportional to but not equal to the phase velocity
- 2equal to the phase velocity
- 3inversely proportional to the phase velocity✓
- 4constant
Correct answer
inversely proportional to the phase velocity
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