A stationary wave is set up on a string of length 10 cm. Four loops are formed. What is the distance between two antinodes?
Correct answer: C. 2.5 cm
- A. 4.5 cm
- B. 5 cm
- C. 2.5 cm
- D. 1.25 cm
Explanation
On a stationary wave, the distance between two successive antinodes is equal to half a wavelength. Four loops on a stationary wave mean two wavelengths which are given as 10 cm. Therefore, half a wavelength will be 2.5 cm. Hence Option C is correct.
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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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