Gravitational waves are ripples in spacetime which are created whenever objects with mass move. They were predicted by Albert Einstein in 1916 on the basis of his theory of general relativity.[1] As gravitational waves are not created from stationary objects, they must be detected from moving systems. Sources of detectable gravitational waves include binary star systems composed of white dwarfs, neutron stars, or black holes.

1. Gravitational Waves

2. Advanced LIGO
 L : Laser
 I : Interferometer
 G : Gravitational wave
 O : Observatory

4. WHAT IS GRAVITATIONAL
WAVE?
• Ripples in space-time
that propagate out at
the speed of light
• Colossal cosmic
collisions and stellar
explosions can rattle
space-time itself
• Einstein first predicted
it in his General Theory
of Relativity.
• After 100 years, his
prediction came true. It
was detected in 14th

5.  WHAT ARE IT’S SOURCES?

6. What is an Interferometer?
• Interferometers are
investigative tools used
in many fields of science
and engineering.
• They are called
interferometers because
they work by merging
two or more sources of
light to create an
interference pattern,
which can be measured
and analyzed; hence
"Interfere-ometer"

7. HOW ARE THEY DETECTED?

8. WHAT’S SO SPECIAL ABOUT IT?
 Big Bang  13 billion years ago
 To see something 13 billion light years away, we must
capture light that began its journey 13 billion years ago.
 For the first 13,800 years of the universe, light could
not break free
 It was DENSE and MURKY.
 Gravitational waves were there.
 We can analyse the property of the early universe.

9. THANK YOU