Search Results | optics

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My scanner has a resolution of 9600x1200 dpi -- what do those numbers mean?

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Scanners vary in resolution and sharpness, and their dots per inch (dpi) are determined by two "sampling rates." Find out how they affect your scanner's functionality.

How Daylighting Devices Work

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Daylighting devices are flexible inventions that can channel sunlight to use instead of electric lighting. Learn more about daylighting devices.

How a Theremin Works

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A theremin is an instrument you can play without touching. Learn how a theremin works and the history of the theremin at HowStuffWorks.

How EUVL Chipmaking Works

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Current chip-producing methods will reach the speed limit in the not-so-distant future. Extreme ultraviolet lithography is the future of computer-chip manufacturing. Find out all about EUV chipmaking.

How Virtual Laser Keyboards Work

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Virtual laser keyboards are great travel gadgets. Learn more about virtual laser keyboards at HowStuffWorks.

How the Gyroscope Works

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Did you know that airplanes and space shuttles use the utterly low-tech gyroscope for navigation? Discover the secret behind gyroscopic motion!

What are the most wired countries in the world and why?

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The most wired countries in the world refers to the countries that have the best access to the Internet's resources. Learn about the most wired countries.

Tech Talk: Web Server Quiz

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Without web servers, there wouldn't be an Internet. Do you know how web servers work to get you online? Take this quiz and find out.

What Your Eyes Can Tell You About Your Cholesterol Levels

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What your eyes can tell you about your cholesterol levels is good information to know for your overall health. Learn what your eyes can tell you about your cholesterol levels from Discovery Health.

How Blue Screens Work

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When an actor dangles over an incredibly deep river gorge, blue screen photography is what makes it look real. Find out how the blue screen technique works and why it's so convincing.

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