The shorter an elecrtomagnetic waves wavelength, the ___

A. Faster is its speed

B. Lower is its energy

C. Smaller its amplitude

D. Higher is its frequency

The higher is its frequency.

Explanation: Electromagnetic waves are types of waves that do not require a material medium for transmission. They include radio waves, microwaves, infra-red and gamma rays among others. Frequency refers to the number of complete oscillations in one second while wavelength is the distance between two successive crests or trough in a transverse wave. The frequency of electromagnetic waves varies inversely to the wavelength. Electromagnetic waves with higher frequencies such as x-rays and gamma rays have lower wavelengths. Those with higher wavelengths, on the other hand, such as microwaves and radio waves have lower frequencies.