Category Archives: Physics

Superhero-vision camera

NPR all tech considered: Super Sensitive Sensor Sees What You Can’t.

“A team of engineers at Dartmouth College has invented a semiconductor chip that could someday give the camera in your phone the kind of vision even a superhero would envy. […] Fossum calls his new technology QIS, for Quanta Image Sensor. Instead of pixels, QIS chips have what Fossum and his colleagues call “jots.” Each jot can detect a single particle of light, called a photon.”

“Whoa, there’s colors!”

PhyiscsGirl: Can you see this type of light? (YouTube, 9:45min) “Polarized light is an unusual form of light. Can humans see when light is polarized?”

By the way, you can train yourself into seeing the polarization of light. The video mentions staring at a lcd screen for a while and tilting your head to see Haidinger’s brush. You can do the same thing with the sky on a clear day. After practicing this for a bit, you’ll be able to detect the polarization of the sunlight easier and easier.

Auf deutsch heißt das Phänomen übrigens Haidinger-Büschel.

“At 13 billion miles from Earth, there’s no mechanic shop nearby to get a tune-up.”

JPL CalTech: Voyager 1 Fires Up Thrusters After 37 Years

“Voyager 1, NASA’s farthest and fastest spacecraft, is the only human-made object in interstellar space, the environment between the stars. The spacecraft, which has been flying for 40 years, relies on small devices called thrusters to orient itself so it can communicate with Earth. These thrusters fire in tiny pulses, or “puffs,” lasting mere milliseconds, to subtly rotate the spacecraft so that its antenna points at our planet. Now, the Voyager team is able to use a set of four backup thrusters, dormant since 1980.

“With these thrusters that are still functional after 37 years without use, we will be able to extend the life of the Voyager 1 spacecraft by two to three years,” said Suzanne Dodd, project manager for Voyager at NASA’s Jet Propulsion Laboratory, Pasadena, California.”

Link via MetaFilter.

Some eye candy: Voyager Images from the Odysseys (NASA Space Photos) (YouTube, 2:48min)