An optical blue quasar at a lookback time of 7 billion years (this is not a nearby galaxy). Normally, something like this would not have infrared emission. Disclaimer: AAAS and EurekAlert!

First there was “the dress,” then there was the sneakers, now there’s a debate over the color blue. If you’ve ever argued with a friend over whether something is blue or green, you’re ...

Terms may apply to offers listed on this page. Costco Optical offers one of the greatest gifts to bespectacled Americans possible: Universal Fit frames that take the guesswork out of what will ...

There's still time to enter this amazing Blue Peter competition! Come up with an idea that could help the planet and be recognised by His Royal Highness, Prince William’s prestigious Earthshot ...

All zoom lenses in film cameras and digital single lens reflex (DSLR) cameras are optical zoom. Digital point-and-shoot cameras as well as consumer and prosumer video camcorders have optical zoom ...

There is a mathematical side to optical illusions. One professor studies them in hopes of creating a safer world. Man on a roof or ladder against the wall: either way, it just doesn't seem ...

Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level ...

Optical fingerprint scanners are the oldest method of capturing and comparing fingerprints. As the name suggests, this technique relies on capturing an optical image — essentially a photograph.

Optical physics is the study of the fundamental properties of light and its interaction with matter. This includes classical optical phenomena such as reflection, refraction, diffraction and ...