Answers Physics B Spring 2026 Mr EdgeRadio Waves and Applications

Radio Waves and Applications Answers

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The diagram shows a device that uses radio waves.

modulate, amplify, and send out waves

capture, amplify, and demodulate waves

change the amplitude and frequency of waves

change the pulse and phase of waves

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What type of modulation is typically used by broadcasting stations to transmit pictures on television screens?

amplitude

frequency

phase

pulse

Lena would like to be able to know her exact location on a map as she travels across the country. Which technology would best help Lena?

CB radio, because it uses HF radio waves

MRI, because it uses magnets to produce a picture

radio telescope, because it captures radio waves from space

GPS, because it uses satellites that provide position and velocity data

Which radio wave technologies would be unaffected by satellites that are not working properly?

space communication and television broadcasting

television broadcasting and GPS

MRI and radio telescopes

radio telescopes and space communication

antennaamplifiermodulatortransmitter

antenna

amplifier

modulator

transmitter

Savanna drew a diagram to show how radio waves are modified for use in the field of broadcasting.

The label at the top of the diagram should be “FM Radio,” not “Cell Phone.”

The FM carrier waves should have different frequencies than the carrier waves, not different amplitudes.

The carrier wave should be on the right of the modulator, not on the left of the modulator.

The modulator should be labeled “Amplitude modulator,” not “Frequency modulator.”

Paul made a diagram to compare and contrast radio waves that are used for communication and for broadcasting. Which labels belong in the areas marked X, Y, and Z?

X: May use LF, HF, and UHF wavesY: Travels at the speed of lightZ: May use MF and VHF waves

X: Travels at the speed of lightY: May use LF, HF, and UHF wavesZ: May use MF and VHF waves

X: May use MF and VHF wavesY: May use LF, HF, and UHF wavesZ: Uses radio waves with long wavelengths

X: Uses radio waves with long wavelengthsY: May use LF, HF, and UHF wavesZ: May use MF and HF waves

In 2010, scientists obtained an image of an asteroid that was dangerously close to Earth. Which technology did the scientists likely use to capture the image?

GPS, because it uses satellites that provide position and velocity data

radio telescope, because it captures radio waves from space

MRI, because it uses magnets to produce a picture

submarine communication, because it uses LF radio waves

Huan made a chart to study for an exam about radio waves.Which headings best complete the chart?

X: PhaseY: Pulse

X: PulseY: Phase

X: AMY: FM

X: FMY: AM

The process of changing a property of a wave to transmit information is called .

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