Question

test your knowledge
select one
what is the wavelength of the wave above?
20 cm
40 cm
10 cm

Explanation:

Step1: Recall wavelength definition

Wavelength is distance between two consecutive crests or troughs.

Step2: Identify consecutive crests

Consecutive crests are at 0 cm and 40 cm.

Step3: Calculate wavelength

Wavelength = 40 - 0 = 40 cm

Answer:

40 cm