Hank regales us with the history of the telescope, and then introduces us to some folks from the team who are working on the newest telescope in the chronology - the James Webb Space Telescope, an infrared telescope due to launch in 2018.

Perhaps you’ve punched out a paper doll or folded an origami swan? TED Fellow Manu Prakash and his team have created a microscope made of paper that's just as easy to fold and use. A sparkling demo that shows how this invention could...

The technology we use for space exploration gets more advanced all the time, but some of our most ambitious programs actually rely on optics invented in the 19th century for lighthouses.

Algae is one of the oldest and most abundant forms of life on planet Earth, so it only makes sense that it offers a ton of solutions to unsustainable modern problems. Here are five ways in which algae continues to reshape the world.

Humans have long known that glass bends light. However, it took us awhile to figure out that stacking lenses in a tube would open up a whole new world to science, finally allowing us a peek at the microscopic.

In this video Paul Andersen explains how ray diagrams for lenses can be used to determine the size and location of a refracted image. Images may be either real or virtual images. Ray diagrams for converging and diverging lenses are...

LIGHT! Let's talk about it today. Sunlight, moonlight, torchlight, and flashlight. They all come from different places, but they’re the very same thing: light! It’s what makes it possible for us to see the world around us, so it’s worth...

Humans have long known that glass bends light. However, it took us awhile to figure out that stacking lenses in a tube would open up a whole new world to science, finally allowing us a peek at the microscopic.

The useful glare-blocking properties of polarized sunglasses are well-known to just about anyone who goes outside. What isn't so well-known is how they reduce glare in the first place. That answer is deceptively complicated!

How do lenses work? How do they form images? Well, in order to understand how optics work, we have to understand the physics of light. In this episode of Crash Course Physics, Shini talks to us about optical instruments and how they make...

An exploration of the AWS Well-Architected Tool, designed to assist in aligning cloud solutions with the six key pillars of the Well-Architected Framework, featuring a walkthrough of the tool's questionnaires, benefits like architecture...

This video provides an overview and comparison of SLR cameras and mirrorless cameras in terms of their features, advantages, and disadvantages. It explains how SLR cameras use mirrors for image reflection in the viewfinder, while...

This video provides an informative explanation of the concept of focal length in lenses. The instructor begins by clarifying the distinction between focal length and focal distance, emphasizing that focal length refers to the...

In this informative video, viewers are guided through the features and benefits of SLR (Single Lens Reflex) and DSLR (Digital Single Lens Reflex) cameras as compared to compact cameras. The narrator discusses the sturdiness, weight,...

2 minute video describing convex and concave mirrors and lenses

Howcast - Learn how to pick a welding helmet or welding hood from sculptor DeWitt Godfrey in this Howcast video.

Howcast - Learn how to use digital camera macro modes and lenses from commercial photographer Dan Bracaglia in this digital photography lesson from Howcast.

Howcast - Learn about digital camera prime lenses versus zoom lenses from commercial photographer Dan Bracaglia in this photography lesson from Howcast.

Howcast - Learn four outdoor photography tips from commercial photographer Dan Bracaglia in this video from Howcast.

Howcast - Learn six digital SLR (DSLR) photography tips from commercial photographer Dan Bracaglia in this digital photography lesson from Howcast.

Howcast - Learn seven basics about digital camera lenses from commercial photographer Dan Bracaglia in this photography lesson from Howcast.

Howcast - Learn what factors to consider when buying a camera in this Howcast video featuring professional photographer Luke Ballard.

Howcast - Learn how to understand different camera lenses from professional photographer Luke Ballard in this Howcast video.

Professional camera cleaning is expensive and usually more than you need. Follow these simple steps to keep your lenses clear and smudge-free.