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Fiber Optic Analog and Digital Link
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1)The basic principle involved in light transmission through a fiber optic link is 
  
2)Light incident on fibers at angles ___________ the acceptance angle do not propagate into the fiber 
  
3)The refractive index of the core region is always __________ that of the cladding region. 
  
4)Colour code of optical fiber is 
  
5)If the refractive index of the core varies gradually then it is known as 
  
6)In case of Intensity Modulation, the recovery of the modulating signal is carried out Statement 1: by direct detection; Statement 2: by heterodyning 
  
7)LEDs are used as light sources in 
  

  


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