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Asked by brijk456 | 04 Sep, 2019, 23:51: PM
answered-by-expert Expert Answer
velocity = frequency × wavelength
 
20 (m/s) = 50 (Hz) × wavelength  
 
hence wavelength = 20/50 = 0.4 m = 40 cm
 
If wavelength is 40 cm, pathdifference of 10 cm is (1/4) times wavelength.
 
If T is time period of one wave,  time difference for 10 cm = (1/4) T  = (1/4)×(1/50) = ( 1/200 ) s
Answered by Thiyagarajan K | 05 Sep, 2019, 16:05: PM

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