Second Time Gravitational Waves Detected by Scientists [ Current Affairs ]


The collision of two black holes 1.4 billion light years away, which creates gravitational waves is second time successfully discover by the scientists for the second time using the twin Laser Interferometer Gravitational-wave Observatory (LIGO) interferometers in the US.

  • With this detection it confirms Einstein’s theory of general relativity and successfully tested LIGO’s capability to sense unbelievably subtle gravitational signals.

Key Facts

  • The LIGO’s twin detectors have relived it which is made in Louisiana and Washington on 26 December 2015 when the waves hit the observatory.
  • The second detection continued about a full second and it was 5 times longer than the first one which was declared in February 2016.
  • The team of researchers determined the wave form signaled a gravitational wave using advanced data analysis techniques.
  • The gravitational wave arose from the collision of two black holes, 14.2 and 7.5 times the mass of the Sun is also calculated by them.
  • On 11th February 2016 the first detection had lasted for 1.1 milliseconds and was very faint signal amid the surrounding noise.
  • It had created a clear peak in the data.
  • The second discovery was far subtler, generating a thinner waveform that was nearly suppressed in the data.

About Gravitational Waves

  • In the curvature of space time, physics, gravitational waves are waves which propagate as waves, drifting outward from the source at the speed of light.
  • In 1916 Albert Einstein has first projected them on the basis of his Theory of General Relativity.
  • Gravitational waves transference energy as gravitational energy and pass through matter deprived of cooperating with it.

- Published on: June 20, 2016