To open the window to this «dark universe,» physicists build gravitational
wave detectors like LIGO that reflect incredibly precise lasers along 2.5 mile - long (4 kilometer - long) «L» - shaped tunnels.
Not exact matches
Like the tuner on a radio, different
detectors (bottom row) pick up different frequencies of gravitational
waves.
Additional gravitational
wave detectors,
like KAGRA in Japan and LIGO - India, are planned for the future, filling out a global network for monitoring the heavens» temblors.
In other words, photons behave
like particles with
detectors present and
like waves without
detectors.
When these bacteria are placed inside an animal, an ultrasound
detector can pick up those signals and reveal the microbes» location, much
like sonar
waves bouncing off ships at sea, explains study coauthor Mikhail Shapiro, a chemical engineer at Caltech.
So if you hook your millimetre -
wave detector up to a video display, a human being comes into view looking
like a bright, human - shaped fluorescent light bulb.
It acted
like a funnel for radio
waves, collecting them into its wide end and guiding them down into a
detector.
But if the physicists remove the
detectors, each photon seems to travel both routes simultaneously
like a tiny
wave, producing the striped pattern.
It was the first cosmic event in history to be witnessed via both traditional telescopes, which can observe electromagnetic radiation
like gamma rays, and gravitational
wave detectors, which sense the wrinkles in space - time produced by distant cataclysms.
Indian scientists made direct contributions — ranging from designing algorithms used to analyse signals registered by
detectors to ascertain those from a gravitational
wave to working out parameters
like estimating energy and power radiated during merger, orbital eccentricity and estimating the mass and spin of the final black hole and so on.