In which of the following instances have the predictions of general relativity been confirmed?
A) gravitational bending of electromagnetic radiation
B) advances in planetary orbits
C) gravitational frequency shifts in the color of light
D) gravitational bending of electromagnetic radiation and advances in planetary orbits
E) gravitational bending of electromagnetic radiation and frequency shifts in the color of light plus advances in planetary orbits

Question

Quizplus · Accepted Answer

All three instances mentioned in the answer choice have been confirmed and are known as some of the most famous confirmations of general relativity. The gravitational bending of electromagnetic radiation was first observed during a solar eclipse in 1919, where the positions of stars near the sun appeared shifted due to the gravity of the sun. Advances in planetary orbits, including the orbit of Mercury, were also a successful prediction of general relativity. Finally, the frequency shifts in the color of light, known as gravitational redshift, have been observed in experiments involving comparing the frequencies of light propagating in different gravitational potentials.

In Which of the Following Instances Have the Predictions of General