A stationary wave is setup on a string which is fixed at both ends. The frequency of the wave is 400 Hz. If the speed of wave is 480 m/s, then what is the length of the string?
Correct answer: C. 0.60m
- A. 1.2 m
- B. 0.84 m
- C. 0.60m
- D. 0.42 m
Explanation
v= f x λλ = v/f = 480/400= 1.2 mFor the first harmonic, 2L= λ,L= λ/2= 1.2/2= 0.6 m
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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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