Question

All components of the electromagnetic spectrum in vacuum have the same

• A. energy
• B. velocity
• C. wavelength
• D. frequency

Answer 1

The correct option is B velocity

$Answer:-$ B

speed of electromagnetic wave in vacuum is given by:-

c(speed of light)=frequency$\times$ wavelength =$\frac{1}{{\mu }_0{ϵ}_0}$=constant

as we go from gamma rays to radio waves frequency decreases and wavelength increases thereby maintaining the product constant.

Energy is given by:- $E=h\nu$ since $\nu$ is different so energy is also different.

Also wavelength and frequency varies.