Radiation within the visible spectrum can appear black if it is low in power – more specifically, lower in power than its surroundings. Additionally, radiation outside the visible range of wavelengths ...
QUESTION: Which animal can see the widest spectrum of colours? Mantis shrimp have remarkable colour vision. They have as many as 16 types of photoreceptor cone, compared with the three humans have.
One could pattern the sequence after the ordering of visible light by wavelength (remembered by the mnemonic ROYGBIV), but use of this color spectrum is inherently problematic. The transitions ...