本题目来源于试卷: Astrophysics and Cosmology，类别为 IB物理学
[问答题]
If nothing, not even jy ch :*gd 6-wda:drvwtnc3000iy r6 llight, escapes from a black hole, then how can we telyg 6 y.-pvvl5,qlaz+ul if one is therelyq-6vluz .yap ,vg+5?
参考答案:
To “see” a black hole in space we need indirect evidence. If a large visible star or galaxy was rotating quickly around a non-visible gravitational companion, the non-visible companion could be a massive black hole. Also, as matter begins to accelerate toward a black hole, it will emit characteristic X-rays, which we could detect on Earth. Another way we could “see” a black hole is if it caused gravitational lensing of objects behind it. Then we would see stars and galaxies in the “wrong” place as their light is bent as it passes past the black hole on its way to Earth.
本题详细解析:
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