Re:The Difference Between ‘Violet’ and ‘Purple’ (2015)
by blincoln on Tuesday April 02, 2019 @12:53PM
(#19556188)
Look for an LED UV torch/flashlight with a wavelength of 400nm.
You could also use a diffraction grating, prism, or spectroscope, but you'll need to make sure the light source going into it actually contains violet light. i.e. if you use one of those with a CFL or LED bulb, you'll most likely not get much (if any) actual violet.
You could also use a diffraction grating, prism, or spectroscope, but you'll need to make sure the light source going into it actually contains violet light. i.e. if you use one of those with a CFL or LED bulb, you'll most likely not get much (if any) actual violet.