A wave, in physics, is a disturbance in the particles of a substance by another entity. We may refer to waves of water found in the seas and oceans as a disturbance in the water that the gravitational pulls of the moon and other celestial bodies are reasons for. The water in the large parts of the hydrosphere moves back and forth in different directions, therefore creating waves. Another example is when you drop something into a lake, or a glass of still water, to take a minor example, the dropping of the object into the water creates a disturbance in the water, i.e., waves. Gravity waves are another kind of wave, but these are not based in water. Instead, they come from outer space, and astrophysicists can sense them using their hi-tech devices.
What Are Gravity Waves?
Gravity waves are one of the incredible forces of nature found in the universe, such as planets, moons, stars, black holes, nebulae, etc. Earth itself produces gravity waves, as does the sun and other celestial bodies. It is the perfect example of one of the components of the universe that we cannot study only with a telescope. These waves help astrophysicists look at the study of the universe not only in the context of light but also using Albert Einstein’s theories of gravity. Gravity waves refer to the ripples or waves that we can sense with the help of experiments that use hi-tech devices.
Gravity Wave Detection Device
These waves are not enough for you to realize that you are feeling them, or even hearing or seeing them. However, they are very intense when detected using the right machinery. Scientists keep the detectors in the Advanced LIGO, i.e., the Advanced Laser Interferometer Gravitational-Wave Observatory. This observatory has two detectors, out of which one is Los Angeles and the other in Wash. The detector is more massive than about 4 kilometers and has two long tubes that meet at a point where they form the shape of an ‘L.’ Laser beams shoot through both tubes of 4 kilometers; a gravity wave is said to have passed through when the distance alters even by a micromillimeter. More observatories for gravity wave detection began to come up after 2015.
Here’s The Reason Why
Einstein’s Prediction Come True
Einstein predicted in the year 1916 that we on Earth would be able to detect a gravity wave soon. At the time, it was somewhat difficult to believe as such a phenomenon is a rare but not an impossible occurrence. Better equipment developed now as compared to a century ago is a factor that helped to detect a wave as recently as in 2015 finally. Advanced LIGO was merely four days away from starting the observation process for gravity waves after upgrades to the device when a test-run was taking place. On 14th September 2015, the laser beams, respectively, went to 3.99999999999999999999 and 4.00000000000000000001 kilometers, which indicated the passing through of a gravity wave. This turned out to be the result of two black holes, five dozen the size of our sun, colliding in space about 750 million to 1.9 billion lightyears away. The collision created waves of energy that spread throughout the universe, reaching the Earth as well, and was hence detected.