#Why??

WHY ARE THINGS DIFFERENT COLOURS?

Well as you probably know our retinas detect electromagnetic radiation in the form of visible light, which is interpreted by our brain to form the picture we see, but that doesn’t explain why my laptop is red and the grass is green…? Well there’s quite a lot more to it than this, but to summarize, the matter of different things will be made up differently, with different atoms and different compounds constituting them. The object you’re looking at will absorb every wavelength of visible light in the spectrum, and re-emit only red (if it is red) for example. But in real life almost everything will absorb some of everything, and reflect some of everything, just a red object will emit predominantly red.