What is the result of combining all colors of the visible spectrum?

1 Answer
May 2, 2016

The simple answer is "white" light, but it depends...


One of my favourite questions to perplex those with a passing aquaintance with physics is "Why does red light plus green light give you yellow light?"

The thing is that pure yellow light has a frequency somewhere between red and green light. So how can longer and shorter waves somehow combine to give you something in between?

They don't.

The effect upon our eyes of a combination of pure red and pure green light is similar to the effect of pure yellow light.

Regarding the current question: If all of the colours of the visible spectrum are combined in appropriate proportions, the resulting colour perceived will be white.


The universe is officially beige.

Bonus 2

"All the colours of the rainbow" does not include magenta.