Exploring Waves in Communication Technology

Which of the following properties of a wave determines its energy?

• Amplitude

• Wavelength

• Frequency

• Speed

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NGSS.HS-PS4-1

How does the frequency of a sound wave affect its pitch?

• Higher frequency results in a lower pitch

• Higher frequency results in a higher pitch

• Frequency does not affect pitch

• Lower frequency results in a higher pitch

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NGSS.HS-PS4-1

What happens to a wave when it passes through a narrow opening and spreads out?

• Reflection

• Refraction

• Diffraction

• Absorption

Which of the following is an example of wave interference?

• Two waves meeting and creating a larger wave

• A wave bending around an obstacle

• A wave reflecting off a surface

• A wave changing speed in a different medium

In signal transmission technologies, what is the primary function of a modulator?

• To increase the speed of the signal

• To convert digital signals to analog signals

• To amplify the signal

• To filter out noise from the signal

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Which of the following best describes the relationship between wavelength and frequency in a wave?

• They are directly proportional

• They are inversely proportional

• They are unrelated

• They are equal

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NGSS.HS-PS4-1

What is the primary reason sound waves are used in underwater communication?

• Sound waves travel faster in water than in air

• Sound waves can travel long distances in water

• Sound waves are less likely to be absorbed by water

• Sound waves are unaffected by water temperature

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NGSS.HS-PS4-5

Which of the following technologies uses electromagnetic waves for information transfer?

• Fiber optic cables

• Radio broadcasting

• Pneumatic tubes

• Hydraulic systems

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NGSS.HS-PS4-5

What is the effect of constructive interference on wave amplitude?

• It decreases the amplitude

• It increases the amplitude

• It has no effect on the amplitude

• It cancels the wave

Which of the following best explains why fiber optic cables are efficient for data transmission?

• They use sound waves to transmit data

• They use light waves, which travel faster than electrical signals

• They are less expensive than copper cables

• They are easier to install than other cables

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