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ETA-I Study Guide (Fiber Optics Installer Certification) (FOI) with 100% correct answers
An optical fiber works based off of a principle known as; correct answersTotal Internal Reflection. 
 
The bending of light as it passes from one transparent material into another which has a different refractive index is what? correct answersRefraction. 
 
Light is electromagnetic radiation in the wavelength range including visible, ultraviolet, X-rays and _______________. correct answersInfrared. 
 
What are the three parts of a typical optical fiber? correct answersCore, Cladding, buffer Coat...