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Q29 (CDS-II/2010) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Waves and acoustics Answer Verified

Which of the following statements about the sound waves is/are correct? 1. The distance between two consecutive compression's is called the wavelength. 2. Sound waves are pressure waves. , Select the correct answer using the code given below :

Result
Your answer: —  Â·  Correct: C
Explanation

Sound waves are mechanical longitudinal waves that propagate through a medium via alternating regions of high and low pressure. Statement 1 is correct because the wavelength of a longitudinal wave is defined as the distance between two consecutive compressions or two consecutive rarefactions [t1][t2][t6]. Statement 2 is also correct as sound waves are fundamentally pressure waves; they consist of periodic variations in pressure where compressions represent regions of high pressure and rarefactions represent regions of low pressure [t3][t4][t7]. These pressure variations cause the particles of the medium to oscillate parallel to the direction of wave propagation [t2][t9]. Since both statements accurately describe the physical properties and definitions associated with sound waves, the correct answer is 'Both 1 and 2'.

Sources

  1. [1] https://www.britannica.com/science/sound-physics
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