A bat emits ultrasonic Sound of frequency 1000 kHz in air

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#1

A bat emits ultrasonic Sound of frequency 1000 kHz in air. If the sound meets a water surface, what is the wavelength of (i) the reflected sound, (ii) the transmitted sound? Speed of sound in air is 340 m ${{s}^{-1}}$ and in water 1486 m ${{s}^{-1}}$.


#2