Borrowing from modern telescope design, researchers have proposed a way to concentrate sunlight to ramp up laser efficiency. Legend tells of Greek engineer and inventor Archimedes using parabolic ...

Real sunlight is a beautiful thing, but due to the vagaries of Earth’s orbit and local weather systems, it’s not available all the time. [Matt] decided this wasn’t good enough, and set about building ...

Victor Pougon, a software engineer from France, has created a DIY 'artificial sunlight' that allows you to enjoy soft sunlight streaming in through your window even at night or on a bad weather day, ...

A light rigid structure (of aluminum or other material) which reflects sound to a focus at which a MICROPHONE is placed. This focussing effect is very strong with WAVELENGTHs less than the aperture of ...