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Tapering of shadow

  1. Jun 8, 2015 #1
    The Earth casts a shadow. Why does this shadow taper?
  2. jcsd
  3. Jun 8, 2015 #2
    Venus also casts a shadow. On Earth we just see a small spot when Venus transits the Sun.
  4. Jun 8, 2015 #3


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    Staff: Mentor

    Because the Sun is not a point source of light but an extended object. Does that answer your question or have I misunderstood what taper means here?
  5. Jun 8, 2015 #4
    You mean if it were a point source, the shadow would not tapper (thinned) . So would it get thicker?
  6. Jun 8, 2015 #5


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  7. Jun 8, 2015 #6
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