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Sound is produced by the vibration of objects. Sound is a longitudinal wave. Sound needs a material medium to travel.(i) What do C and R in the figure indicate?(ii) Find out the wavelength in the figure and write it down.(iii) What is the speed of the wave if its frequency is 92 Hz? |
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Answer» (i) C for compressions and R for rarefactions. Wavelength of longitudinal wave The distance between corresponding points of two consecutive compressions or two consecutive rarefactions is the wavelength of the longitudinal wave. (ii) Wavelength = 1 m (iii) Velocity V = f λ = 92 × 1 = 92 m/s |
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