LIGO, Gravitational Waves - Current Affairs Questions and Answers

ANSWER: Squeezed vacuum

Explanation:
Researchers have developed a fresh technology to make the Advanced Laser Interferometer Gravitational Wave Observatory to become more sensitive to gravitational waves which are faint ripples in space time.

• MIT and Australian National University team of researchers report on improvements in what is called the squeezed vacuum source
• Injecting the new squeezed vacuum source into the LIGO detector could help to double sensitivity
• Scientists announced the first ever observation of g-waves earlier this year 100 years after Einstein predicted their existence in his general theory of relativity
• In case this is implemented, it will boost the sensitivity of gravitational detectors specifically at higher frequencies vital for understanding the composition of neutron stars

ANSWER: Both a and b

Explanation:
Sound waves may exist but hearing the experience has proved to be unforgettable for physicists worldwide. Gravitational waves were first theorised by Albert Einstein in 1916 as part of the theory of general relativity. These are faint ripples in space time which are a forth dimension. What happens is that when massive yet compact objects such as black holes or neutrons combine through collision, gravity sends ripples across the universe. While the indirect proof of the existence of gravitational waves in 1970s led to the awarding of the 1993 Nobel Prize in physics, this announcement is considered a direct detection of the gravitational wave. Gravitational waves are the soundtrack of the universe and Einstein theorised that scientists would ever be able to hear them. Sensitivity is vital for the LIGO instrument detecting the waves as LIGO detects waves that stretch and squeeze the entire Milky Way galaxy by as little as the width of the thumb.Each LIGO has two giant arms more than 2 miles long which are perpendicular. A laser beam is split and travels both ways bouncing off mirrors to return to the arms' intersection. Gravitational waves stretch the arms to create an incredibly tiny mismatch infinitely smaller than a subatomic particle which is detected by LIGO.

ANSWER: Laser Interferometer Gravitational-Wave Observatory

Explanation:
In a discovery that has been lauded by scientist Stephen Hawking and the scientific world, scientists have detected gravitation waves as the ripples in the fabric of space time predicted by Einstein 100 years ago finally became confirmed. This moment has been likened to the time when Galileo took to the telescope to observe planets. Discovery of these waves formed by violent collisions in the universe opens new ways of observing the cosmos,, specifically its soundtrack. A USD 1.1. billion instrument Laser Interferometer Gravitational-Wave Observatory, or LIGO, has been used to detect a gravitational wave from the distant crash of two black holes, one of the ways these ripples are created. This discovery is as big as the finding of the God particle.