Hello @mathowl, thanks for coming and also for the comment, I do appreciate your time.

But as regards your comment:

You are not going to get all wavelengths of light. A prism refracts light. Microwaves are not going to appear when you refract light from the sun using a prism :P

It is when you only pass visible light through a prism you get a continuous spectrum of rainbow colours which have all the wavelengths of light.

Mind the term "visible light". Of course, microwave is not the same as visible light and a prism only get to refract visible light not microwave.

Light is made up of wavelengths of light, and each wavelength is a particular colour. The colour we see is a result of which wavelengths are reflected back to our eyes.Visible light is the small part within the electromagnetic spectrum that human eyes are sensitive to and can detect.

Visible light waves consist of different wavelengths. The colour of visible light depends on its wavelength.

These wavelengths range from 700 nm at the red end of the spectrum to 400 nm at the violet end.Visible light waves are the only electromagnetic waves we can see. We see these waves as the colours of the rainbow. Each colour has a different wavelength. Red has the longest wavelength, and violet has the shortest wavelength. When all the waves are seen together, they make white light.White light is actually made of all of the colours of the rainbow because it contains all wavelengths, and it is described as polychromatic light.

^source

I'll be looking forward to many more of your comments.

Thanks.