What is electromagnetic
waves

waves that are created as a result of vibrations between an electric field and a magnetic field

Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field.

Explanation:

In other word, EM waves are composed of oscillating magnetic and electric fields. They are also perpendicular to the direction of the EM wave. It can be split into a range of frequencies. This is known as the electromagnetic spectrum. Examples : radio wave, microwave,X-rays etc

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resonant frequency

get the total number of pieces of fruit and divide it by 4 to get the average. the result is the answer to the problem. 14 total number of fruits and there are 4 members. 14 divided by 4 is equals to 3.5.