Question

Clear selectic
Q. A sound note emitted from a certain source has a velocity of 300 m/sln air
and 1050 m/s in water. If the wavelenth of sound note in air is 2 m, the
wavelength in water is
2 m
O O
7 m
O Option 5​

Answer 1

Explanation:

Solution

In air : Speed of sound wave (v) = 340 m/s , Frequency of source of sound (υ)=20 kHz.

Wavelength of the sound wave λ=?

v=υλ

∴λ=vυ=34020=17m.

Wavelength of the sound wave in air =17 m.

Same source kept in water :

Speed of sound in water (v) = 1480 m/s

Frequency of sound wave (υ)=20 kHz

Wavelength of sound wave λ=?

v=υλ

∴λ=vυ=148020=74m.

Wavelength of the sound wave in water = 74 m.