According to Einstein, the gravitational interaction is possible between_______________?
Correct answer: B. material objects and electromagnetic radiation only
- A. material objects only
- B. material objects and electromagnetic radiation only
- C. electromagnetic radiations
- D. none of the above
Explanation
In Einstein's relativity, electromagnetic radiation carries energy and momentum, so it participates in gravitational interaction along with material objects. Thus the intended answer is material objects and electromagnetic radiation. The likely mistake is choosing material objects only, which follows the classical idea that gravity acts only on mass.
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