Optics is the study of the properties and behavior of light. In this section you can learn about everything from holograms to lasers and lenses.
How Optical Illusions Work
wIt's a young lady! It's an old woman! It's a blue dress! No, it's gold! Learn more about optical illusions at HowStuffWorks.com See more »
What is cosmological redshift?
Cosmological redshift: sounds like the latest blockbuster coming to a theater near you, doesn't it? Find out what cosmological redshifts are all about. See more »
How Impossible Colors Work
Impossible colors are within the visible spectrum, but our brains can't perceive them. Learn more about how impossible colors work. See more »
How can a telescope see through time?
Telescopes help us see time in a new way. Find out how the speed of light plays a role in how telescopes alter time. See more »
How much does light weigh?
How can you measure what light weighs? Learn how much light weighs at HowStuffWorks. See more »
How Laser Communication Works
Laser communications may be a boon for outer space and here on Earth. Learn more about laser communications at HowStuffWorks.com. See more »
How Kaleidoscopes Work
Kaleidoscopes have been around since the early 1800s. But how do these glass gadgets operate? Read more about kaleidoscopes at HowStuffWorks. See more »
Quiz: A Wardrobe of Invisible Cloaks
Is an invisibility cloak possible? Take this quiz to test your knowledge of the technologies out there that are making invisibility cloaks a reality. See more »
What are the colors in the visible light spectrum?
All colors that you see fall into the visible light spectrum. Learn about the colors in the visible light spectrum in this article. See more »
How Scanning Electron Microscopes Work
Scanning electron microscopes give scientists an incredible level of magnification. Learn about scanning electron microscopes. See more »
Loading more content
Gay Termites Plot the Death of Kings
The Two Months That See the Most Divorce Filings
Not a Coffee Fan? That Could Be Genetic
See More Headlines »