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QPage 339: Q3: HC Verma: Concepts of Physics - Volume 2 Electromagnetic Waves Page 339: Q3 Solution: Speed of electromagnetic waves is the same

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often mistake the statement that electromagnetic waves travel at the same speed for all intensities as implying the speed is the same in every medium; remember $c$ is constant only in vacuum, while in a material $v=c/n$ depends on the refractive index, not on wavelength, frequency, or intensity.

Speed of electromagnetic waves is the same

Multiple Choice Options

  • A For all wavelengths
  • B For all frequencies
  • C In all media
  • D For all intensities

Step-by-Step Verified Solution

**Answer:** (d) For all intensities. **Step-by-Step Explanation:** The speed of electromagnetic waves in vacuum is the same for all wavelengths, frequencies, and intensities.

All Questions in this Chapter

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