How might you watch a swell in space? On the off chance that the space
between you and me extended or compacted, we wouldn't see it on the off
chance that we had made blemishes on our figurative elastic sheet, for
instance, utilizing similarly separated rocks. Since these imprints would likewise
get extended further separated. In any case, there is one ruler that doesn't get
extended, one made utilizing the speed of light. In the event that the space
between two focuses gets extended, then light will take more time to go from
one indicate the other. Furthermore, if the space gets crushed, light sets aside
less opportunity to cross the two focuses. This is the place the LIGO test comes
welcome has 4 kilometer long passages and utilizations lasers to quantify the
adjustments out yonder between the closures of the passages. At the point
when a gravitational wave comes through, it extends space in one heading, and
crushes space in the other course. By measuring the impedance of the lasers as
they skip between the diverse focuses, physicists can quantify decisively
whether the space in the middle of has extended or packed. Scientists now
have the capacity to investigate the Universe in this entire new way. That is the
reason distinguishing gravitational waves is so noteworthy.
Mostafa Eltobgy