Colours of the Sky

It is kind of a clichè – I know, pictures of the sunset. Still, I think most people find them beautiful.  But why does the sky turn orange?

Molecules and small particles in the atmosphere change the direction of light rays, causing them to scatter, which affects the colour of the light. The wavelength of the light, and the size and  amount of molecules the light has to pass through, determines the colour. The short wavelength colours blue and violet are scattered in the air much more than other colours, hence the sky appears blue. However, at sunset and sunrise, the sun is low on the horizon, and the light has to pass through more air, which also means more molecules to scatter the light. The result is that the blue and violet light is scattered out of your sight, while the other colours with longer wavelength brakes through the atmosphere and find their way to your eyes. This is why sunsets may appear yellow, orange and/or red.

Here are some other colourful pictures

Colourful Sky


One thought on “Colours of the Sky

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s