Question

A tuning fork vibrating in water with a frequency of 840 Hz produces waves that are 2.5 m long. If a tuning fork vibrating at 500 Hz produces the same type of wave in water, what will the wavelength of the waves be?

A) 1.5 m
B) 4.2 m
C) 3.2 m
D) 2.5 m

Answer 1

Option B

Step-by-step explanation:

As we know

Frequency (F) * wavelength (W) = C (speed of light - can also be taken as constant)

Hence,

`F1 W1 = C\\F2W2 = C`

Or
`F1W1 = F2W2`

Substituting the given values, we get -

`840 *2.5 = 500 *XX = 4.2` m

Hence, option B is correct