Optics
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.
You Know White Noise, But What's Pink Noise and Brown Noise?
Skipping Stones on Ice Makes Crazy Sci-fi Sounds
Can you really shatter a glass with a high note?
How Do Disposable Hand Warmers Work?
Why Do Bubbles Pop?
What's the World's Strongest Superacid?
Static Electricity Can Cause Way More Than a Bad Hair Day
Light Pollution Is Stealing the Night
Party Trick Breakdown: Why Do Balloons Stick to Hair?
The Surprising Silver Lining of the Atomic Age Nuclear Tests
How Are Coroners and Medical Examiners Different?
Viking Warrior in Ancient Grave Was a Woman
Time May Not Exist, Say Some Physicists and Philosophers
How Alchemy Paved the Way for Chemistry
Who Was the First Scientist?
A Kid-friendly Introduction to Magnets and Magnetism
How Solenoids Work
Why Does Ice Stick to Your Fingers?
How Can Minus 40 Fahrenheit Equal Minus 40 Celsius?
What Does the Term 'Six Degrees of Separation' Mean?
11 Basic Math Symbols and How to Use Them
Kummakivi, Finland's Balancing Rock, Seems to Defy the Laws of Physics
What Is Energy?
Could Newly Measured W Boson Break the Standard Model?
U.S. Scientists Achieve a Breakthrough in Nuclear Fusion. What Does That Mean?
Hisashi Ouchi Suffered an 83-day Death By Radiation Poisoning
Could Thorium Power the Next Generation of Nuclear Reactors?
Learn More / Page 2
A group of scientists from Duke University have demonstrated a simplified cloaking device. Learn about the cloaking device that the Duke scientists created and find out if a real-life cloaking device is actually possible.
If you want to see a hologram, you don't have to look much farther than your wallet. But the most impressive holograms are large scale and illuminated with lasers or displayed in a darkened room with carefully directed lighting. Learn how a hologram, light and your brain work together make clear, 3-D images.
We first reported on the possibility of an invisibility cloak last year. Now a different invisibility cloak is making the news -- one that uses metamaterials to redirect light away from the wearer.
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An invisibility cloak seems perfectly believable in the magical world of Harry Potter, but in the real world, it's impossible, right? Not so fast.
NASA's Mars rovers are sending 3-D images to Earth, so we can see depth and texture on the Martian surface. And how do we see this depth and texture? 3-D glasses, of course! Check out how they work.
You're driving down the road on a sunny day, and you see a puddle of water coming up. You look again and it's gone! What happened? You’ll be able to answer that question if you read our miraculous mirage article.
By Tom Harris
The human eye misses a lot -- enter the incredible world of the microscopic! Explore how a light microscope works.
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For centuries, curious observers have probed the heavens with the aid of telescopes. Today, both amateur and professional scopes magnify images in a variety of ways.
Just about everyone has seen a television show or movie in which a criminal suspect is questioned while detectives watch from behind a one-way mirror. How does a piece of glass manage to reflect light from one side while remaining clear on the other?
Some of the brightest minds in history have focused their intellects on the subject of light. Einstein even tried to imagine riding on a beam of light. We won't get that crazy, but we will shine a light on everything scientists have found so far.
Imagine wearing a T-shirt with lettering on it while brushing your teeth. Why are the letters on the T-shirt reversed in the mirror, while your head appears right side up?
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Just how far can the human eye see? There's no exact formula to figuring it out, but we do have an idea.
I have a thin piece of plastic mounted on the back window of my RV. It magnifies things so I can see better when I'm backing up. How can such a thin piece of plastic magnify things? A regular glass magnifying lens would have to be curved on both sides and much thicker.
Lasers are used in CD players, dental drills, eye surgery, and even tattoo removal. But what exactly is a laser? There are numerous types, but all lasers work basically the same way. Learn how they generate such concentrated beams of light.