Sunday, 3 March 2013

3.21 explain the meaning of critical angle c

When light travels from one medium to another it is refracted; it changes angle due to change in density.
Past a certain angle the light will simply be refracted back into the medium it is in, this angle is the critical angle.
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6 comments:

  1. Unknown4 April 2014 at 06:51

    Critical Angle is the angle of incidence for which the angle of refraction is 90 degrees

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  2. Unknown6 April 2014 at 10:48

    Anytime :)
    btw, ur blog is AWESOME :D

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    Replies
    1. HannahHelp24 May 2014 at 08:55

      Its people like you who help make it awesome by making good comments ;) Good luck in you exam

      Delete
  3. Unknown14 May 2014 at 15:10

    light reflected back into the more dense medium

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  4. Studyyyygirl19 May 2015 at 07:03

    ** to add : seen on the surface of block

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