In: Physics
Which of the following is FALSE with regards to the detection of gravitational waves?
A. As in looking through a telescope, the further away the source of the signal the longer ago the event occurred.
B. The more mass/energy converted to gravitational waves, the larger the expected signal.
C. The closer the source of the waves, the larger the expected signal.
D. The changes in the frequency of the observed signal depend on the path the waves take but not the source of the signal.
ANSWER- D.
EXPLANATION-
Looking far and far in the sky means looking farther in past since signal on telescope is not the signal originate in present. It is the signal originate in the past. Hence option (A) is correct.
Gravitational wave signal depend on mass/energy. Signal of black hole (more dense) is more intense than sun (less dense). Hence option (B) is correct.
Signal is large if souce is nearer. As we go far from source intensity of signal decreases. Hence option (C) is correct.
The changes in the frequency of the observed signal not only depend on the path the waves take but also the source of the signal. Hence option (D) is incorrect about gravitational wave.