Usually involves feeling of fear or insecurity. The loss of confidence in things that have always been stable or dependable in the past â this includes things such as a relationship, your personality structure, health, etc; so the breakdown of opinions, attitudes or relationships which seemed so dependable and you have taken for granted.
Crests and troughs. Waves have moving crests (or peaks) and troughs. A crest is the highest point the medium rises to and a trough is the lowest point the medium sinks to. Crests and troughs on a transverse wave are shown in Figure 1. A crest is a point on the wave where the displacement of the medium is at a maximum.
This is the highest part of the wave above still water level. See also Crest. Peak Direction. This is the wave direction at the frequency at which a wave spectrum reaches its maximum. Peak Period / Wave Period. This represent the period of time it takes for consecutive wave crests or wave troughs to pass a given point. The greater the wave period is the better the swell. Refraction