Final answer:
In deep-water waves, the depth exceeds half the wavelength. The amplitude of a wave is the height from the midpoint to the crest or trough, and the frequency indicates how often the wave cycles per second.
Step-by-step explanation:
In deep-water waves, the water depth is greater than the wavelength divided by two. This means for deep-water conditions, the depth is more than half the distance between successive crests or troughs of a wave. The amplitude, frequency, and period of a wave are also crucial concepts in understanding wave dynamics.
The amplitude of a wave is related to its energy and is defined as the height from the center line to the crest or the trough. The bird sitting on the water's surface will experience motion due to the amplitude of the water wave. If the amplitude is 0.2 m, the bird will move up and down a total distance of 0.4 m (twice the amplitude since it goes from the trough to the crest) and this occurs with a frequency equal to the rate of wave cycles per second, which in the given example is 2 Hz, meaning the bird will bob up and down twice every second.