What is the Doppler effect?
Correct Answer: Doppler effect is the change in frequency of a wave due to the motion of the source or observer.
- Step 1: Understand that waves can be sound waves or light waves.
- Step 2: Know that the frequency of a wave is how often the wave occurs in a certain time.
- Step 3: Imagine a source of sound, like a siren on an ambulance, moving towards you.
- Step 4: As the ambulance approaches, the sound waves get compressed, making the sound higher in pitch (frequency).
- Step 5: When the ambulance moves away from you, the sound waves stretch out, making the sound lower in pitch (frequency).
- Step 6: This change in pitch as the source moves is called the Doppler effect.
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