Summary ETA Fiber Optic Installer Certification - Study Guide Exam Answered.

ETA Fiber Optic Installer Certification - Study Guide Exam Answered. Light is electromagnetic energy with a _____ frequency and a _____ wavelength compared to radios. What type of light is used in fiber optic transmissions? What are the four items needed for a fiber optic system to work? 1 mW is the same as what in dBm? How is the power measured in fiber optics? What fiber optic wavelength has the lowest loss? What wavelength windows are used most for fiber optic communications? - What year was fiber optic cable first used in commercial telephone systems in the U.S.? What light source is used for singlemode fiber? What two light sources are used with multimode fiber? All wavelengths of light travel at the same speed. (true or false; why) Which type of fiber has the larger core size: singlemode or multimode? - What is OSHA responsible for? What are two ways to reduce modal dispersion? What happens to the wavelength in fiber when the number of modes increase? - Where does Fresnel reflection occur? What is it called when light bends when moving between water and air? - What is the refractive index of the core and cladding of fiber? Singlemode fiber systems usually operate at what three wavelengths? What two multimode wavelengths are the most commonly used? How is attenuation measured? What is a