The speed of electromagnetic waves in a vacuum . The speed of electromagnetic waves in a vacuum . is larger for longer wavelengths is the same for all waves regardless of wavelength is the same as the speed of sound is larger for higher energies

is the same for all waves regardless of wavelength

Explanation:

Electromagnetic waves are often collectively called light. Light has become a generic name that is applied to all electromagnetic waves. The arrangement of electromagnetic waves according to their respective wavelengths is called the electromagnetic spectrum.

When passing through a vacuum, all electromagnetic waves irrespective of their individual wavelengths must possess the same speed. This is called the speed of light in a vacuum. The speed of light in a given medium is a constant and applies to all electromagnetic waves irrespective of their frequency and wavelength.

step-by-step explanation:

we are given

we have to simplify it

firstly, we will factor it

now, we can cancel like terms

now, we can combine it

so, we get

no. dot product   =0 when vecs at right angles