本题目来源于试卷: Light: Geometric Optics，类别为 IB物理学
[问答题]
Light rays from stars (including our Su1m a .2w /rc27afwiov+bzg4emi)1lm yn) always benipusx((g. m9hd toward the vertical direction as they pass through the Earth’s atmospig9(uphx .s m(here.
(a) Why does this make sense?
(b) What can you conclude about the apparent positions of stars as viewed from Earth?
参考答案: (a) The fact that light rays from stars
(including our Sun) bend toward the vertical direction as they
pass through Earth’s atmosphere
makes sense because the index of refraction of the atmosphere is slightly
greater than that of the vacuum of space.
Thus, as the light rays from stars enter the atmosphere, they slow down
and bend toward the vertical, according to Snell’s law.
(b) The apparent positions of
stars in the sky are too high when compared to actual positions. Since
the light rays bend toward the
vertical as they come into the atmosphere and then into our eyes, as we
“follow” these rays back into space, which doesn’t take the bending into
account, the image of the stars appears higher than the actual position.
本题详细解析:
暂无
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