Regardless of the kind, every wave has an amplitude. Amplitude is the maximum displacement of points on a wave, which you can think of as the degree or intensity of change. This maximum displacement is measured from the equilibrium position.The picture below shows a diagram of a sine wave.mplitude is an important parameter of waves and is the maximum displacement of points on a wave. Stated another way, amplitude is the vertical distance between a peak or a valley and the equilibrium point. Frequency is the number of wave cycles passing a point per unit time.
Darkfield Digital Image Gallery Dogfish Shark Placoid Scales Dogfish sharks are small sharks belonging to one of three families: the dogfish shark family, Squalidae; the requiem shark family, Carcharhinidae; and the cat shark family, Scyliorhinidae.he green dogfish, along with several other members of the dogfish shark family, is luminescent. Scales are small plates that form part of the skin of certain animals. They provide protection from the environment and from predators. Sharks have placoid scales, bony, spiny projections with an enamel-like covering.
Scales serve to protect the body from the outside dangers such as predators and infection. Cosmoid scales Cosmoid scales are found in the Lungfish (family Ceratodidae) and some fossil fishes. Cosmoid scales are similar to placoid scales and likely evolved from the fusion of placoid scales.They consist of two basal layers of bone, a layer of dentinelayer of dentine--like cosmine, and an outer like cosmine, and an outer layer of vitrodentine. Placoid Scales Often referred to as denticles.cales serve to protect the body from the outside dangers such as predators and infection. Cosmoid scales Cosmoid scales are found in the Lungfish (family Ceratodidae) and some fossil fishes. Cosmoid scales are similar to placoid scales and likely evolved from the fusion of placoid scales.