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posted by  shorty09 on 4/30/2008 10:03:50 PM  |  status: Live  

Internal Refraction

Course Textbook Chapter Problem
Algebra Based Physics N/A N/A N/A
Question Details:
Light rays are deflected from a small defect in the glass toward the surfdace of the glass. If  θc  is 40 degrees, and the index of refraction  of glass is 1.556. What is the angle of incidence?
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posted by John(Cramster SME) on 5/20/2008 6:36:16 AM  |  status: Live
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shorty09's comment:
"thanks much!!"
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   the critical angle is nothing but the angle of incidence for which the angle of refraction is 90o
   here we are given with θc = 40o
  
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posted by Pradeep on 5/20/2008 8:12:39 AM  |  status: Live
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shorty09's comment:
"thanks much"
Response Details:
As in question condition that LIGHT comes back in glass.
So for this angle of incidence should be greater that critical angle
So the angle of incidence,  i> θc

=>   i> 400
for any incident angle greater than 40 degree, the light will comes back in the glass medium
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