Geology Interview Question:

What makes mountains appear purple?

Submitted by: Administrator

This is to do with light and the atmosphere.

The way the rays of light strike the mountains at a greater height than us, then reflect and reach our eyes below the height of mountains, coupled with the air in-between, leads to them looking purple, in a similar way to the process with different wavelength light makes the sky look blue on a sunny day.
Submitted by: Administrator