Question

What type of lamps would you use for UV range radiation? Why? and What lamp would you use for Visible range of radiation? Why?

Answer 1

Ultraviolet (UV) is an electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays. So for UV rays, we would use mercury vapour lamps, tanning lamps etc, because these source have higher recombination energy of electrons from higher to lower ground states and hence they have higher energy photons leaving the system, i.e tin the ultraviolet region

For visible light, we can easily use heating elements, as they have the energy to produce photons while exciting back to the ground state while releasing photons in the visble spectrum range