Question

1. measure: with the lights on, click pause. turn on show rulers.

a. use the horizontal ruler to measure the horizontal distance between two crests. what is this
distance?
this is the wavelength of the wave
b. what is the distance between the two troughs?
the wavelength can be found by measuring the distance between two successive crests, two
successive troughs, or any two equivalent points on the wave.

Explanation:

Step1: Recall the definition of wavelength

The wavelength of a wave is defined as the distance between two successive crests or two successive troughs (or any two equivalent points on the wave).

Step2: Apply the definition to the problem

Since the question asks for the distance between two troughs (which are equivalent points on the wave), by the definition of wavelength, this distance is the wavelength.

Answer:

Wavelength