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A body generates waves of 100 mm long through medium A and 0.25 m long in medium B. If the velocity of waves in medium A is 80 cm s-1 . Then, calculate the velocity of waves in medium B.

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In medium A wavelength λA = 100 mm = 0.1 m

In medium A velocity vA = 80 m/s = 0.8 m/s 

In medium B let velocity be vB 

In medium B, wavelength λB = 0.25 m 

As the frequency of the wave remains same in the two media, so

= 2 m/s 

∴ Velocity of waves in the medium B = 2 m/s

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