If you blow air over the top of a fairly large drinking straw you can hear a fundamental frequency due to a standing wave being set up in the straw. What happens to the fundamental frequency if while blowing you cut the straw in half with a pair of scissors?

The fundamental frequency remains unchanged

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The fundamental frequency decreases

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The fundamental frequency increases

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Solution

The correct option is C
The fundamental frequency increases

The fundamental frequencies of all pipes, independently of whether they are open-open or open-closed, varies inversely with the length of the pipe. Hence halving the length of the pipe doubles the fundamental frequency.

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If you blow air over the top of a fairly large drinking straw you can hear a fundamental frequency due to a standing wave being set up in the straw. What happens to the fundamental frequency if while blowing you cut the straw in half with a pair of scissors?

The correct option is C The fundamental frequency increases The fundamental frequencies of all pipes, independently of whether they are open-open or open-closed, varies inversely with the length of the pipe. Hence halving the length of the pipe doubles the fundamental frequency.

The correct option is C
The fundamental frequency increases

The fundamental frequencies of all pipes, independently of whether they are open-open or open-closed, varies inversely with the length of the pipe. Hence halving the length of the pipe doubles the fundamental frequency.