Question

The speed of electromagnetic waves depends upon

• A. Wavelength
• B. Frequency
• C. Intensity
• D. Medium, in which it travels

Answer 1

Answer: (D)

Speed of wave $=\frac{1}{\sqrt{u\epsilon }}$
$=\frac{I}{\sqrt{{\mu }_0{\mu }_r{\epsilon }_0{\epsilon }_r}}$
It depends upon the medium.