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Wavelength of a wave in a certain medium is 20 cm and its velocity is 350 m/s . The same wave is transmitted into a medium where the velocity is 1400 m/s . Its wavelength in the medium would be ?


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Answer : (d) $\;80\;cms$
Explanation :
As the same wave is transmitted from one medium to another , frequency of the wave remains same .
frequency = $\;\large\frac{v_{1}}{\lambda_{1}}=\large\frac{v_{2}}{\lambda_{2}} \quad => \large\frac{350}{20} =\large\frac{1400}{\lambda_{2}}$
answered Mar 7, 2014 by yamini.v

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