Answer :

An electromagnetic wave is defined as a wave which has electric as well as magnetic components and which travels at the speed of the light. Hence, the visible light which has both electric and magnetic components falls under the category of electromagnetic wave. In fact there are many type of light/waves/radiation are present which has electric as well as magnetic component like X-rays, microwave, radio waves etc.

The distribution or arrangement of these different types of electromagnetic waves upon the basis of frequency or wavelength is electromagnetic spectrum.


IMG-20180608-WA0013.jpg


In the figure the electromagnetic spectrum is shown in which on the left side there is highest frequency wave while on the right side there is lowest frequency wave. So, from going left to right the frequency of the electromagnetic waves decreases. While their exact opposite in the case of wavelength.


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<span lang="EN-USKerala Board Physics Part II