SI unit of the intensity of wave is
Correct answer: C. wm-2
- A. jm-2 s-2
- B. jm-1 s-1
- C. wm-2
- D. jm-2
Explanation
The intensity of a wave is a measure of the energy transported by the wave per unit of time and per unit of area. The formula for the intensity (I) of a wave is given by:I= P/AWhere:I= intensity of a wave P= power carried by the wave A= cross-sectional area through which the wave is passingThe SI unit of power (P) is the watt (W), and the SI unit of area (A) is the square meter (m²). Therefore, the unit of intensity is watts per square meter (W/m²).
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Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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