Question

lesson 1 waves introduction back to intro page letter d represents the of the wave. (1 point) frequency wavelength crest amplitude

Explanation:

To determine what letter D represents in the wave diagram, we analyze each option:

• Frequency: Number of waves per unit time, not a vertical measurement as D is. Eliminate.
• Wavelength: Distance between two consecutive crests/troughs (horizontal), but D is vertical. Eliminate.
• Crest: The highest point of a wave, but D is a vertical segment from the midline to a crest, not the crest itself. Eliminate.
• Amplitude: Defined as the maximum displacement of a point on the wave from its rest (equilibrium) position. In the diagram, D is the vertical distance from the midline (x - axis) to the crest, matching the definition of amplitude.

Answer:

D. amplitude