LIGO above lets  say we use

THANK YOU (we use this as the laser source i.e sent to the beam - splitter )

1 (we use this as a detector arm i.e both detector arms are the same distance)

1 (we use this as a detector arm i.e both detector arms are the same distance)

YOU HAVE REACHED INTERNATIONAL 9 1 1 (we use this as the light detector i.e  if one of the detector arms come back shorter than the other we know that we have found  ripples in space time because YOU HAVE REACHED INTERNATIONAL 9 1 1 the numbers are shorter than the letters)

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