Radio Telescopes Which Use Dishes to Gather Radio Waves Are

question 18

Multiple Choice

Radio telescopes which use dishes to gather radio waves are _______ telescopes.

• A)reflecting
• B)refracting
• C)deflecting
• D)compound
• E)retracting

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Definitions:

3-Phase

Refers to an electric power system that uses three alternating currents of the same frequency, which are out of phase with each other by 120 degrees, to deliver power in a more efficient manner than single-phase electricity.

Full-Rectification

The conversion of AC (alternating current) to DC (direct current) using both halves of the input waveform, usually in power supply or electronic signal processing.

Rotor

The rotating part of an electrical or mechanical device, such as the part in an electric generator or motor which turns around a stationary part called a stator.

Stator

(1) A stationary element in a rotating component; (2) The stationary member of an alternator into which electrical current is induced by the rotor; (3) Intermediary in a torque converter torus located between the impeller and turbine; redirects oil from the turbine back to the impeller.