IEEE BYTE VOLUME-3 ISSUE-1 | Page 9
Nobel Prize in Physics 2017
By Soumyadeb Bhattacharjee , SE EXTC
The Nobel Prize in Physics 2017 was divided, one half awarded to Rainer Weiss, the other
half jointly to Barry C. Barish and Kip S. Thorne " for decisive contributions to the LIGO
detector and the observation of gravitational waves" . Though these three got the prize,
know that LIGO was the result of thousands of scientists working world over in
collaboration for decades. And they didn’t just answer a 100-year-old question — they
launched a whole new branch of science.
Once upon a time, in a galaxy far, far away, two massive black holes engaged in a deadly
dance. They revolved around each other, spiralling faster and faster until they were whirling at
half the velocity of light when they collided and merged, forming an even massive black hole.
Two black holes colliding unleash a loud thunderclap of gravity. By the time they reach our
planet, the waves have greatly diminished, needing e
xtremely sensitive instruments .
If you were near the black holes when they collided, you’d see the universe expand and
contract like you were living inside a funhouse mirror. If you were wearing a watch on each
wrist, you'd see them tick out of sync. But by the time they reach the Earth — like ripples
nearing the edge of a pond — they grow faint.
A hundred years ago, Albert Einstein predicted that such a massive collision would distort the
very fabric of space and time itself. Like a stone cast into a pond, the cataclysmic disturbance
would ripple outward at the speed of light, filling the ocean of the universe with gravitational
waves. Einstein, however, never thought it would be possible to detect such waves. But now, it
has become possible.
Gravitational waves are 'ripples' in the fabric of space-time caused by some of the most
violent and energetic processes in the Universe.