What instrument does the Fermilab Holometer experiment use?
Gamma-Ray Spectrometer
Electron Microscope
40m Laser Interferometer
Large Hadron Collider
Answer
The Fermilab Holometer experiment uses a 40m laser interferometer to detect gravity waves. This instrument consists of two arms, each 40 meters long, that are perpendicular to each other. Laser light is sent down each arm, and the interference pattern between the two beams is monitored. If a gravity wave passes through the experiment, the interference pattern will change, as the length of each arm will change slightly.
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