Which colours does air scatter the most?	Blue and violet
What is the scattering of light by air molecules called?	Rayleigh scattering
Why are sunsets orange and red?	Light crosses more air, so blue scatters away
White sunlight is a mix of...	All the colours of the rainbow
When is golden hour?	Just before sunset and after sunrise
What is blue hour?	Twilight just after sunset or before sunrise
Which clouds often make the most colourful sunsets?	Mid- and high-level clouds
In which direction does the Sun set?	Roughly west
About how long does sunlight take to reach Earth?	About 8 minutes
A prism splits white light into colours by...	Refraction
Which visible colour has the longest wavelength?	Red
Why do clouds look white?	Their droplets scatter all colours about equally