antenna
Antennas convert electrical signals to electromagnetic waves and can perform the reverse process. This topic is part of Communications within Technology. This page currently draws on 16 supporting questions, with answers and bonus facts available below.
antenna trivia questions
A radio antenna is designed primarily to transmit or receive what?
Answer: Electromagnetic waves
Bonus fact: Antennas convert electrical signals to electromagnetic waves and can perform the reverse process.
On an insect, antennae are used mainly for what purpose?
Answer: Sensing the environment
Bonus fact: Insect antennae can detect odors, touch, humidity, vibration, and other environmental cues.
A simple half-wave dipole antenna has a total length approximately equal to what fraction of the signal wavelength?
Answer: One-half
Bonus fact: A half-wave dipole is approximately half a wavelength from end to end.
Why are antennas often mounted high on towers?
Answer: Greater height improves line-of-sight coverage
Bonus fact: Higher placement reduces obstruction by terrain and buildings.
What was one early purpose of community antenna television, the ancestor of cable?
Answer: Improve reception in areas with weak broadcast signals
Bonus fact: Community antennas relayed distant TV signals to subscribers.
A television antenna receives what?
Answer: Broadcast radio-frequency signals
Bonus fact: Antennas convert electromagnetic waves into electrical signals.
Traditional rooftop TV antennas often use what arrangement of metal elements?
Answer: Directional array
Bonus fact: Yagi-style and log-periodic antennas are common designs.
Why does antenna orientation matter?
Answer: Reception improves when aimed appropriately toward transmitters
Bonus fact: Direction affects signal strength and interference.
On a theremin, one antenna controls pitch. What does the other control?
Answer: Volume
Bonus fact: Hand position in the two antenna fields controls pitch and volume.
A communication tower supports what equipment?
Answer: Antennas
Bonus fact: Antennas transmit and receive radio-frequency signals.
What device receives over-the-air television signals at a home?
Answer: Antenna
Bonus fact: Antennas capture radio-frequency broadcasts.
Satellite television delivers signals from what?
Answer: Orbiting satellites
Bonus fact: Dish antennas receive signals from space.