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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.

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.

New Eyewear Protects Your Identity from Facial Recognition Cameras

Reflectacles are a new kind of eyewear that keeps you face from being shown on CCTV. HowStuffWorks Now investigates. See more »

Samsung Eyes Projecting Holograms From TV — No 3-D Glasses Required

Has Samsung developed a 3-D television set that can project holograms? Learn more about holographic technology in this HowStuffWorks Now article. See more »

Why Spinning Blades Look Weird on TV

Why do helicopter and fan blades look weird on TV? Learn more about why spinning blades look odd in this HowStuffWorks Now article. See more »

Scientists Create Mind-blowing 3-D Acoustic Holograms

What is an acoustic hologram? Learn more about acoustic holograms from Duke University in this HowStuffWorks Now article. See more »

How Optical Illusions Work

It's a young lady! It's an old woman! It's a blue dress! No, it's gold! Learn more about optical illusions at See more »

Lucky Tetrachromats See World With Up to 100 Million Colors

Have you ever thought you could see more colors than your peers? Tetrachromats do. Learn more about this real superpower at HowStuffWorks Now. 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 »