Doppler Effect

What is the Doppler effect?

• A phenomenon where a wave's speed and wavelength change, while its frequency remains constant.

• A phenomenon where a wave's speed and frequency change, while its wavelength remains constant.

• A phenomenon where a wave's speed, frequency and wavelength all decrease in the same direction.

• A phenomenon where a wave's speed, frequency and wavelength all increase in the same direction.

What happens to sound waves when the source moves away from the observer?

• The sound wavelength increases, and frequency increases.

• The sound waves increase in speed.

• The sound wavelength decreases, and frequency decreases.

• The sound wavelength increases, and frequency decreases.

Under a Doppler effect, what happens to the frequency of sound waves as the source approaches an observer?

• The sound waves decrease in frequency.

• The sound waves remain unchanged.

• The sound waves become distorted.

• The sound waves increase in frequency.

The frequency of the waves that reflect off of a moving object changes after reflecting off the object. Is this an example of the Doppler effect?

• No

• Depends

• Maybe

• Yes

Doppler effect is most commonly associated with which type of waves?

• Gravitational waves

• Sound waves

• Light waves

• Radio waves

What is the Doppler effect mainly used for in meteorology?,

• Measuring air temperature

• Measuring air pressure

• Tracking storms

• Measuring wind intensity

Under a Doppler effect, what happens to the frequency of sound waves when the source moves away from the observer?

• The frequency increases

• The frequency is distorted

• The frequency remains the same

• The frequency decreases

How does the Doppler effect work for light waves?

• The frequency decreases as the light wave moves away from the source.

• The frequency increases as the light wave moves away from the source.

• The frequency decreases as the light wave moves towards the source.

• The frequency increases as the light wave moves towards the source.

What is an application of the Doppler Effect in military technology?

• Measuring air temperature

• Tracking missiles

• Measuring air pressure

• Measuring wind intensity

What is the Doppler effect most commonly used for in astronomy?

• Tracking stars

• Measuring distances

• Measuring radiation

• Measuring gravity