Wave Communication

EM waves are also good for ...

• communication

• social environments

• space

• communities

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NGSS.HS-PS4-2

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Wave A and Wave B have the same frequency and wavelength. Wave A has a greater amplitude than Wave B. Which statement BEST compares the two waves?

• Wave A has more energy than Wave B

• Wave B has more energy than Wave A

• Wave B transmits energy through matter, while Wave A does not.

• Wave A transmits energy through matter, while Wave B does not.

What advantages do electromagnetic signals have over electronic signals?

• electromagnetic signals are sent over wires

• electromagnetic signals are faster and can be sent wirelessly

• electronic signals cannot transmit information

• electronic signals are less reliable

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NGSS.HS-PS4-5

With the large number of devices communicating wirelessly these days, how are the signals kept from going to the wrong place?

• Each device has an internal code that has to match the code of an incoming transmission.

• Different devices operate on different wavelengths of the electromagnetic spectrum.

• The signals are routed through the wireless network like a post office sorts mail by zip code.

• Devices with larger antennae use higher frequencies and devices with smaller antennae use lower frequencies to communicate.

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NGSS.HS-PS4-5

The distance a wave travels from crest to crest in know as the _________.

• Frequency

• Wave length

• trough

• refraction

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NGSS.HS-PS4-1

Frequency is expressed in units called ___________________

• Newtons (N)

• Microns (Mc)

• Hertz (Hz)

• Periods (Pd)

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NGSS.HS-PS4-1

Which electromagnetic wave has the longest wavelength?

• Radio

• infrared

• x-ray

• gamma

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NGSS.HS-PS4-1

All electromagnetic waves have the same...

• frequency

• speed

• wavelength

• energy

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NGSS.HS-PS4-1

Which type of wave is primarily used in mobile phone communication?

• Radio waves

• Sound waves

• Microwaves

• Infrared waves

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NGSS.HS-PS4-5

What is the main advantage of using fiber optics in wave communication?

• Higher bandwidth

• Lower cost

• Easier installation

• More flexibility

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