Engineering

Laser technology helps researchers scrutinize cancer cells

Devising the best treatment for a patient with cancer requires doctors to know something about the traits of the cancer from which the patient is suffering. But one of the greatest difficulties in treating cancer is that ...

Hi Tech & Innovation

Waymo to sell its self-driving tech to outside firms

Waymo, the former Google car division developing self-driving technology, said Wednesday it would sell a key innovation to companies that don't compete with its autonomous cars.

Engineering

Finding keyholes in metals 3-D printing

Additive manufacturing's promise to revolutionize industry is constrained by a widespread problem: tiny gas pockets in the final product, which can lead to cracks and other failures.

Engineering

Laser-powered-drones may beat endurance hurdles

Hmm. Drones that can be recharged by a laser. So how long could they fly before having to land? How about "never mind"? We can look forward to seeing this idea in action. New Scientist had a story on September 3 that the ...

Engineering

Engineers develop origami electronics from cheap, foldable paper

UC Berkeley engineers have given new meaning to the term "working paper." Using inexpensive materials, they have fabricated foldable electronic switches and sensors directly onto paper, along with prototype generators, supercapacitors ...

Robotics

The first wireless flying robotic insect takes off

Insect-sized flying robots could help with time-consuming tasks like surveying crop growth on large farms or sniffing out gas leaks. These robots soar by fluttering tiny wings because they are too small to use propellers, ...

Consumer & Gadgets

Mini-projector offers up tablet and wall whiteboard views

Always a show-stopping concept: something lightweight that turns objects we have in the real world into virtual touchscreens. A Shanghai-based company wants to roll with that concept, in the form of its special mini-projector, ...

Robotics

Construction site robot adapts as tools drop, plans change

Robots engineered for construction sites are in the news this week. Namely, there is a robot called the In-situ Fabricator. Described as an autonomous construction robot, one can put the accent on autonomous.

page 1 from 3

Laser

A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.

This text uses material from Wikipedia, licensed under CC BY-SA