A bat emits ultrasonic sound of frequency 1000 kHz in air. If the so

1.	A bat emits ultrasonic sound of frequency 1000 kHz in air. If the sound meets a water surface, what is the wavelength of (a) the reflected sound, (b) the transmitted sound? Speed of sound in air is 340 ms-1 and in water 1486 ms-1
Answer» Here, v = 1000 kHz = 1000 x 10³ Hz = 10⁶ Hz Velocity of sound in air, v_a = 340 ms^-1 Velocity of sound in water, v_w = 1486 ms^-1 (a) For reflected sound, medium remains the same ∴ Wavelength, λ = v_a/v = 340/10⁶ = 3.4 x 10^-4 m (b) For the same transmitted into water, Wavelength, λ = v_ω/v = 340/10⁶ = 1.49 x 10^-3 m

A bat emits ultrasonic sound of frequency 1000 kHz in air. If the sound meets a water surface, what is the wavelength of (a) the reflected sound, (b) the transmitted sound? Speed of sound in air is 340 ms-1 and in water 1486 ms-1

Answer»

Here,

v = 1000 kHz

= 1000 x 10³ Hz = 10⁶ Hz

Velocity of sound in air, v_a = 340 ms^-1

Velocity of sound in water, v_w = 1486 ms^-1

(a) For reflected sound, medium remains the same

∴ Wavelength, λ = v_a/v = 340/10⁶

= 3.4 x 10^-4 m

(b) For the same transmitted into water,

Wavelength, λ = v_ω/v = 340/10⁶

= 1.49 x 10^-3 m

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A bat emits ultrasonic sound of frequency 1000 kHz in air. If the sound meets a water surface, what is the wavelength of (a) the reflected sound, (b) the transmitted sound? Speed of sound in air is 340 ms-1 and in water 1486 ms-1

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