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Numericals


               1. Two tuning forks produce sounds of wavelength 1 and 1.5 m respectively in the air

               medium. Find the ratio of their frequencies.

               2. A hospital uses an ultrasonic scanner to locate tumors in a tissue. The operating

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               frequency of the scanner is 4.2 MHz The speed of the sound in a tissue is 1.7 kms .
               Find the wavelength?


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               3. Wavelength of an electromagnetic wave is 55 x 10            m. Find the time period of
               the wave?

               4. A string vibrates with a frequency of 500 Hz. If the transverse vibrations are such

               that  the distance  between  consecutive  crests  is  20  cm,  Find the  velocity and  time
               period of the wave?










































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