Asked by fgs b
Rohit is trying to tune an instrument. He strikes a tuning fork and then plays a note that almost matches it. Rohit hears the volume of the two waves beating, which sounds like "wah-wah-wah-wah."
What is the cause of the beats?
The two waves produced have different speeds.
The two waves produced have different amplitudes.
The two waves produced have different wavelengths.
The two waves produced have different frequencies.
All Answers 1
Answered by
GPT-5 mini
AI
The two waves produced have different frequencies.
When two close frequencies f1 and f2 interfere, the sum is a high-frequency tone whose amplitude is modulated at the difference frequency |f1 − f2|. That amplitude modulation is heard as beats ("wah‑wah") at the beat frequency.
When two close frequencies f1 and f2 interfere, the sum is a high-frequency tone whose amplitude is modulated at the difference frequency |f1 − f2|. That amplitude modulation is heard as beats ("wah‑wah") at the beat frequency.
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