The detection of ripples in space time known as gravitational waves here on Earth marks a wate...........

Science Affairs Space

The detection of ripples in space-time, known as gravitational waves, here on Earth marks a watershed moment for astronomy and for science as a whole. Consider the following statements regarding this:

1. The signals of gravitational waves were detected by twin Laser Interferometric Gravitational-wave Observatory (LIGO) detectors.

2. The reason that gravitational waves have been so difficult to detect is that their effects are very tiny.

3. This opens the way to get information about the evolution of galaxies and black holes.

Which of the above statements are correct?

1 and 3 only

1 and 2 only

2 and 3 only

1, 2 and 3

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Explanation:

Gravitational Waves
• The detection of ripples in space-time, known as gravitational waves, here on Earth marks a watershed moment for astronomy and for science as a whole.
• The signals of gravitational waves were detected on September 14, 2015 by twin Laser Interferometric Gravitational-wave Observatory (LIGO) detectors located about 3,000 km apart at Hanford, Washington and in Livingston, Louisiana, in the United States.
• Indirect evidence for the existence of gravitational waves had been seen from the decaying orbital period of objects called binary pulsars — which Russel Hulse and Joseph Taylor discovered in 1974 and for which they were awarded the Nobel Prize in 1993 — a direct detection of gravitational waves had till now proved to be extremely difficult.
• The reason that gravitational waves have been so difficult to detect is that their effects are very tiny. In fact, the signals they produce are so small that scientists struggle to remove enough background noise to confirm them.
• This opens the way to get information about the evolution of galaxies and black holes.