A stationary wave is formed in a pipe which is open at one end. If two complete loops are formed and the wavelength of the wave is 10 cm, what is the length of the pipe?
Correct answer: C. 12.5 cm
- A. 10 cm
- B. 15 cm
- C. 12.5 cm
- D. 7.5 cm
Explanation
Since, two complete loops are formed and since it is opened at one end , the length of stationary wave will be;λ/4 +λ/2+λ/2 =5λ/4This length of the wave will be equal to the length of the pipe.L= 5λ/4L= (5×10)/4L= 12.5 cm
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About Stationary Waves
Stationary waves form when two waves of the same frequency and amplitude travel in opposite directions and interfere. The topic covers nodes, antinodes, wavelength, phase, resonance, and the allowed frequencies on strings and in air columns. Unlike progressive waves, stationary waves do not transfer energy from one point to another.
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