If Earth had no atmosphere like the Moon there would be no scattering, and the sky would remain black, even in daylight ...

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

Even though emeralds and rubies are very different colors, they both have the same secret ingredient in their atomic ...

The light that we see is made up of many different colours. There are three primary colours: red, green and blue. They can be combined in different ways to make every other colour. The colour of ...

Colour is an illusion, not part of the real world We think of colour as being a fundamental property of objects in life: green trees, blue sky ... of course, is light.” As light pours down ...

Red, green and blue filters each transmit a single primary colour. Any other colours present in the light are absorbed. A red filter only transmits red light. It absorbs blue light and green light.