Answered

To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its

Awavelength.
Bintensity.
Crefraction.
Damplitude.

Verified Answer :

12pweedygul

And its wavelength because wavelength is the distance between two points.

The correct choice is

A. wavelength.

The frequency of electromagnetic wave is given as

\(f=\frac{c}{\lambda }\)

where "c" stands for speed of light whose value is well known as 3 x 10⁸ m/s  and λ stands for wavelength of wave.

hence to determine the frequency, we need wavelength of wave. hence the correct choice is wavelength.

Related Questions