Beat Frequency
Beat frequency between two sources f1, f2 is:
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About This Question
- Subject
- physics
- Chapter
- oscillations and waves
- Topic
- beat frequency
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
|f1 - f2|
Beats occur when two waves of slightly different frequencies f1 and f2 travel in the same direction and superimpose.
- At some points, they are in phase (constructive), and at others, they are out of phase (destructive).
- This produces an 'envelope' wave whose intensity pulses (beats) periodically.
- The frequency of these pulsations is given by the change in relative phase, which is fbeat=∣f1−f2∣.
This easy difficulty physics question is from the chapter oscillations and waves, covering the topic of beat frequency. It appeared in the 2025 exam.
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