But back then, the sun’s UV rays were very damaging. These single-celled early earthlings responded to blue-yellow light, which kept them out of harm’s way. They would migrate away from the ...

You can use a prism to split (or disperse) white light into a spectrum of colours: red, orange, yellow, green, blue, indigo and violet. Dispersed means that the colours are separated out.

Blue, conversely, conveys comfort and calmness, which is why cruise lights are a solid blue instead of red or yellow ... had only a single blue light on its roof. This is when whether the ...

A green filter only transmits green light. It absorbs red light and blue light. If yellow light shines at a red filter, red light passes through the filter. This is because: yellow light is a ...