(via freshphotons)

"The idea is that if a gravitational wave passes through GEO600, it will alternately stretch space in one direction and squeeze it in another. To measure this, the GEO600 team fires a single laser through a half-silvered mirror called a beam splitter. This divides the light into two beams, which pass down the instrument’s 600-metre perpendicular arms and bounce back again. The returning light beams merge together at the beam splitter and create an interference pattern of light and dark regions where the light waves either cancel out or reinforce each other. Any shift in the position of those regions tells you that the relative lengths of the arms has changed."

Damn, science is cool. Oh, by the way, our world may be a giant hologram.

(h/t Joe O’Sullivan)

Aw, come on guys — obviously you’d have to create the universe before you preheat the oven.

(via essbee:The Daily What)