The diagram above illustrates a wave setup between two fixed ends 4.0m apart. If the speed of the wave is 1.0ms‾¹, its wavelength and frequency respectively are?

A. 1m; 0.25Hz
B. 2m; 0.25Hz
C. 2m; 0.50Hz
D. 4m; 0.50Hz

Correct Answer: Option C

C. 2m; 0.50Hz

Explanation

For the 4th harmonic, L=2λ
4m=2λ ⟹ λ=4m/2
=2m
Recall, v=fλ
1=f×2⟹f=1/2
= 0.50Hz