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Total Internal Reflection

Published in: Physics
  • Elizabeth C

    • Kochi
    • 13 Years of Experience
    • Qualification: M.Sc. & B.Ed.
    • Teaches: Physics, Chemistry
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TIR Explanation

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    Total Internal reflection
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    ' Laws of refraction ' How the path is changed when light travels from denser to rarer medium?
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    ' Air(rarer) Water(denser)
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    ' Air(rarer) Water(denser)
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    Air(rarer) i=c i i C=critical angle Water (denser) The angle of incidence in the denser medium for which the angle of refraction in the rarer medium is 90 degree is called critical angle (c)
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    Diagram Showing TIR r=90 i=c ate (denser)
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    Total internal reflection When light travels from denser medium to rarer medium and if the angle of incidence is greater than the critical angle the entire light reflected back to the medium obeying laws of reflection. This phenomenon is called TOTAL INTERNAL REFLECTION(TIR)
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    Conditions for TIR Light must travel from denser medium to 1. rarer medium The angle of incidence must be greater than the critical angle
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    Applications of TIR ' Totally reflecting prism Mirage Brilliancy of diamond Optical fibre


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