Why Do Faraway Mountains Look Blue?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why do faraway mountains look blue?

The Big Idea

Faraway mountains look blue because the air between you and them is never perfectly clear! Tiny bits in the air scatter blue light more than red light. Lots of scattered blue light adds up to a blue haze.

Sunlight Has Colors

Step one: sunlight has colors. Sunlight looks white, but it is a mix of all the colors of the rainbow. Blue light bounces around much more easily than red light.

Air Scatters Blue

Step two: air scatters blue. Tiny air molecules and particles scatter blue light in every direction. The air is never perfectly clear.

More Air, More Blue

Step three: more air, more blue. When mountains are far away, lots of air stands between you and the peaks. All that scattered blue light adds up, so the farther away they are, the bluer they seem.

A Closer Look

Let's take a closer look! The closest ridge looks dark and clear. The middle ridge looks lighter and bluer. The farthest ridge looks pale and hazy. Tiny droplets given off by trees can add to the blue haze, too.

Quick Facts

Quick facts! The Blue Ridge Mountains are named for their blue color. The blue is strongest on warm, hazy days, when the air is full of tiny bits. Artists use pale blue for faraway mountains to show depth. Never look straight at the Sun to see colors.

Think Like a Scientist

Now, think like a scientist! Draw a row of mountains. Use dark colors for the front ones and lighter blue-gray for the ones farther back. Your picture will feel deep, like you could walk right into it! Share what you discover with a grown-up.

Outro

Air scatters blue light, so faraway mountains look blue. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!