Why Do Astronomers Require Measurements from at Least Three Gravitational

question 148

Multiple Choice

Why do astronomers require measurements from at least three gravitational wave detectors to identify the source of a gravitational radiation signal?

• A) Gravitational waves have a wavelength of about a thousand kilometers, requiring detections across large distances.
• B) Gravitational waves are so weak that several detectors are required to confirm a signal.
• C) Three detections are required to separate real gravitational waves from locally generated noise.
• D) The time delay between the different detectors allows astronomers to identify the direction of the source.

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