Question

we now learn England
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Answer 1

Answer:

A black hole is a region of spacetime exhibiting gravitational acceleration so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form ablack hole.Ferry's black body consists of a hollow double-walled sphere which is blackened inside. The sphere has a small hole on its surface. Directly opposite to hole, there is a wedge shaped structure inside the sphere.