But somewhere in humans' evolutionary history, that photoreceptor shifted more toward detecting violet than ultraviolet wavelengths. Perhaps we couldn't afford the damage to our eyes because we ...

It might seem like a simple question. But the science behind a blue sky isn't that easy. For starters, it involves something called the Rayleigh effect, or Rayleigh scattering. But that same ...

Each color that makes up the spectrum of visible rays has a particular wavelength. The five principal colors—red, yellow, green, blue, and violet—make possible thousands of shades and hues ...

violet wavelength. This laser is focused enough to read bits of information that are less-than-half the size of those in a DVD. A traditional Blu-ray disc holds about five times as much data as a ...

The signal is analysed by a latest-generation quad detector suited for violet wavelengths, providing the customer with five different analog optical signals. The complete board of signals includes ...