ATT Week 11 Test (FC) Questions With Correct Answers

What causes refraction? - Answer A change in the speed of light. What is the most common optical detector? - Answer Photo Diodes. __________ determines the color of light. - Answer Wavelength What affects a detectors responsivity? - Answer Changes in wavelength. The range of frequency that an optical fiber cable has is known as___________. - Answer Bandwidth What optical fiber cable is made of several concentric layers? - Answer Multimode graded-index What is a superheterodyne good for? - Answer Extreme sensitivity and stability. A synchronizer performs the task of __________. - Answer Timing What part does timing rely on? - Answer Synchronizer. What information does RF energy reflected from an object (echo) provide a RADAR? - Answer Bearing, range, velocity, and elevation. ___________ is the effect of signal loss associated with high frequency currents flowing near the outer surface of the conductor. - Answer Skin effect What is characteristic impedance? - Answer The distributed inductance and capacitance of a line. What transmission lines have the largest surface area? - Answer Waveguides. ____________ is/are the result of improper waveguide joining. - Answer Standing waves What is the ability of an antenna to act as an antenna and a receiver called? - Answer Reciprocity. What is a truncated parabolic antenna used for? - Answer RADAR microwave system. Power gain is the measure of an antenna's ___________. - Answer efficiency How is the efficiency of an antenna measured? - Answer The use of a reference antenna. What kind of beam is needed to determine bearing? - Answer Narrow, horizontal.