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.
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