it depends on what you are talking about if your talking about light here it is light can be classified as a wave when your talking about crests and troughs a crest is the top most part of the wave if you split the wave in half the trough has the same principle it is the lowest most part of the wave if you split it in half does that clarrify a little bit?
The answer depends on what you mean by a trapezoidal trough. Is it a trough whose cross-section is a rectangle at any height but which increases linearly with the height or is it a trough whose base and each face is a trapezium.
See while you are sawin . . What does trough mean?
Trough
Do you mean trout or trough? Please give some context to your question.
A very old trough. A hard-wearing trough. A durable trough. One tough trough.
A trough is a depression in the surface or shape being examined. For example: 1. A valley between Mountains is a trough. 2. The dip between waves is a trough. 3. Hold out your hand and spread your fingers. The area between your fingers are troughs.
The closest word in Spanish I can come up with is: tolla - which means: trough
a trough or fold of stratified rock in which the strata slope upward from the axis.
the trough the trough the trough
The pig ate from the trough. Trough is a noun.
The possessive form of the singular noun trough is trough's.
A trough, or a drinking trough.