Jump to content
Sign in to follow this  
  • entries
  • comments
  • views


Sign in to follow this  


There are two types of colors in the world: additive and subtractive. 

Additive deals with the source: sun, stars, and light bulbs for example. These light sources mix red, green and blue wavelengths to produce white light. If you were to spotlights that slightly overlap one another of those three colors, where all three overlap would create white light. 

Subtractive deals with objects that reflect light, so anything that isn't a light source itself. Consider your favorite shirt. Mine is red. When I wear my red shirt, or whatever color yours is, my shirt is actually absorbing every other color except for red. So technically, your shirt (or mine) is every color except what we perceive it as! If your shirt is black, that just means it absorbs every color. 

Sign in to follow this  

1 Comment

Recommended Comments

It so cool to think that color absorbs light and that different colors mixed with each other creates different colors. 

Share this comment

Link to comment
Add a comment...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Terms of Use

The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.

Copyright Notice

APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to info@aplusphysics.com. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.

  • Create New...