A longitudal wave is produced on a slinky. The wave travels at a speed of 30 `cm//s` and the frequency of the wave is 20 Hz. What is the minimum separation between two consecutive compression of the slinky?

Options

A. 1.0 cm
B. 1.5 cm
C. 2.5 cm
D. 3.0 cm

Answer

B

Explanation

Wave speed, `v = 30"cm s"^(-1)`
Frequency of the wave, `v = 20" Hz" = 20" s"^(-1)`
Wavelength `=("Wave speed")/("Frequency") = (30"m/s")/(20" s"^(-1) ) = 1.5` cm
The minimum separation between the consecutive compressions is equal to the wavelength. Therefore, minimum separation between the consecutive compression= 1.5 cm