In a ripple tank experiment, a vibrating plate is used to generate ripples in the water. If the distance between two successive troughs is 3.5 cm and the wave travels a distance of 31.5 cm in 1.5 s, calculate the frequency of the vibrator
-
A.
3.0Hz -
B.
6.0Hz -
C.
12.0Hz -
D.
27.0Hz -
E.
73.5Hz
Correct Answer: Option B
Explanation
λ = 3.5cm V =D/T = 31.5/1.5 = 21; f = V/ λ = 6.0