yrelhan4
  • yrelhan4
refraction help?
Physics
chestercat
  • chestercat
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yrelhan4
  • yrelhan4
any ideas about 2nd question. a start will be good.
yrelhan4
  • yrelhan4
@Mashy
yrelhan4
  • yrelhan4
the formula for radius of the sphere so that no light comes out is R=h/sqrt (mu^2 -1) this might help you.

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yrelhan4
  • yrelhan4
@Vincent-Lyon.Fr
anonymous
  • anonymous
what aspect of refraction do you not understand.?
anonymous
  • anonymous
|dw:1361076183674:dw| the condition for the source to be JUST seen is that... so find for what radius is that condition satisfied.. once you have what the final radius is... then you can find the time taken to get to that radius!
yrelhan4
  • yrelhan4
got it. i was just doing a calculation mistake. thank you anyway.
anonymous
  • anonymous
ahh glad to help ;-)

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