An article written by: Lee Sonogan
“Science is spectral analysis. Art is light synthesis.” – Karl Kraus
The visible spectrum is an electromagnetic spectrum that is visible to the human eye. This electromagnetic radiation comes in wavelengths. Which is pretty much called visible light or simply light. The average human eye will respond to wavelengths from about 390 to 700 nm. However, the spectrum does not contain all the colours that the human eyes and brain can identify.
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. Or as we now know as infrared to ultraviolet. Colours containing only one wavelength are also called pure colours or spectral colours.
Objects appear in different colours because they absorb some colours/wavelengths and reflected or transmit other colours. The colours we see are the wavelengths that are reflected or transmitted. White objects appear white because they reflect all colours. Black objects absorb all colours so no light is reflected.
The primary colours of light are red, green and blue. Mixing colours in different amounts can make all the colours of the light we see. TV and computer screens use this process to work. If you look at a screen with a magnifying glass you will be able to see that only these three colours are being used.
Recapping, colour is wavelengths of energy with different characteristics and elements. Or moving subatomic particles reflecting off objects and substances. Colour has its own physics while having many uses in technology and human life. We have learnt so much from the colour spectrum through history and as we advance, colour will help us to learn more about the quantum level of reality while improving all elements of human life.