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In: Physics

General Relativity Q: What is Einstein’s equivalence principle? Q: What is gravitational lensing? Why is it...

General Relativity

Q: What is Einstein’s equivalence principle?

Q: What is gravitational lensing? Why is it useful for cosmology?

Q: What is gravitational time dilation?

Q: What are MACHOs? What does the MACHO microlensing result mean for dark matter in the Milky Way?

Q: What is the bullet cluster? How does it give evidence for dark matter and against modified gravity?

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