Ultrasonic waves of frequency are passed through a medium

• GP Sound Waves

Ultrasonic waves of frequency 3 × 10⁵ Hz are passed through a medium where speed of sound is 10 times that in air (Speed of sound in air is 300 m/s). The wavelength of this wave in that medium will be of the order of

1. 0.1 cm
2. 1 cm
3. 10 cm
4. 100 cm

Answer

Frequency = 3 × 10⁵ Hz

Speed of sound in medium = 3000 m/s

Wavelength = Speed / Frequency = 0.01 m = 1 cm

The correct option is B.