Color Subtraction Challenge
Channel: Kids Fun Science
Date: 26/04/2020

Color Subtraction Challenge

Chapters
0:00 Intro
0:07 What you need
2:05 Red filter
2:24 experiment

Made for parents and teachers.

Red safety glasses
https://amzn.to/3eYKal9

Pom Poms
https://amzn.to/2VErgrV

Kids Fun Science On-line Store (All money goes back into the schools)
https://teespring.com/stores/kids-fun-science

The white light all around us is made up of all the different wavelengths: each color that we know has a different wavelength.  Many students have passed light through a prism, or seen a rainbow, and know that there are all different colors in the light around us. 

If, instead of a prism, you use a filter, it removes some wavelengths of light.  A red filter will absorb all of the color wavelengths except for red - in our case, that means only red wavelengths can get through the glasses. All the other colors are stripped away/absorbed by the glasses. 

This is called color by subtraction. So, when you wear the red glasses and look at an object, the red glasses absorb all the color wavelengths of that object except for red. So, the less red a color is (think blues, greens), the darker it looks (because more of its wavelengths are being absorbed/subtracted). Reds, yellows and oranges look brighter

Looking through these glasses is similar to what colorblind people see!
We wear glasses like this for laser safety or other applications where there is a wavelength that could hurt our eyes.
Careers like Laser Technician  and Optometrist