Question

The Doppler shift involves a shift in the ___________________. Check all that apply. Group of answer choices actual intensity produced by the source of sound actual frequency produced by the source of sound the perceived pitch of sound observed by a listener the loudness of sound observed by a listener none of these

Answer 1

The Doppler effect is a phenomenon that involves a shift in the observed frequency of a sound due to the relative motion between the source and the observer. The observed frequency can either increase or decrease depending on whether the source and the observer are getting closer or farther apart.

Step-by-step explanation:

The Doppler effect is a phenomenon that involves a shift in the observed frequency of a sound due to the relative motion between the source and the observer. The observed frequency can either increase or decrease depending on whether the source and the observer are getting closer or farther apart. Therefore, the correct answers to the question are:

• Actual frequency produced by the source of sound
• The perceived pitch of sound observed by a listener

The intensity of the sound and the loudness observed by the listener are not directly affected by the Doppler effect. Therefore, the correct answers are not:

• Actual intensity produced by the source of sound
• The loudness of sound observed by a listener

Answer 2

actual frequency produced by the source of sound

Step-by-step explanation:

According to Oxford dictionary; Doppler effect is"an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other."

The actual change in frequency of a wave is called the Doppler shift. The Doppler shift is caused by a constant relative motion between the source of the wave and the observer. This leads to a change in the observed frequency of the wave.