Radiation in color dispersed edge areas

After refraction in a prism white light disperses to VIBGYOR colored radiation and made to fall on a flat screen. Are regions immediately below violet rich in ultra-violet radiation and those above red have more infra-red radiation? If so, has any heating been noticed in these edge areas by sensitive measurement?

That is, does white light have absolutely no UV or IR radiation at all in the spectrum?

• What do you mean by "white light"? How is your white light produced? Jan 17 '18 at 15:45
• From the sun intensified if required by any means. Jan 17 '18 at 15:53

Prisms spread white light into different colors by a process called dispersion: The prism bends higher frequencies / shorter wavelengths (the blue and ultraviolet end of the spectrum) more than low frequencies / long wavelengths (the red and infrared region of the spectrum). The amount of bending depends on the index of refraction $n$. Here's what these look like for around visible light in a quartz prism: Taken from this NIST publication. Visible light is from 0.4 to 0.7 microns in wavelength, so you can see these graphs extend to ~0.2 (ultraviolet) and +1.0 (infrared) microns of wavelength. It is also important to note this doesn't extend forever. The parts of the EM spectrum that bracket the visible range are called the near infrared or the near ultraviolet. Beyond those are the far infrared and the far ultraviolet, and they will no longer disperse in a quartz prism.