Question: How does the gravity wave affect LIGO? a. It causes one of LIGO's 4 km arms to stretch and one to shrink. b. It stretches

How does the gravity wave affect LIGO? 


a. It causes one of LIGO's 4 km arms to stretch and one to shrink. 


b. It stretches both of LIGO's 4 km arms. 


c. It doesn't affect LIGO's steel and concrete arms but affects the laser wavelength directly.

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