# 10 what is the distance from the resting position to a crest or trough in a wave called? Ideas Contents

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A transverse wave is a wave in which the particles of the medium are displaced in a direction perpendicular to the direction of energy transport. A transverse wave can be created in a rope if the rope is stretched out horizontally and the end is vibrated back-and-forth in a vertical direction. If a snapshot of such a transverse wave could be taken so as to freeze the shape of the rope in time, then it would look like the following diagram.  The dashed line drawn through the center of the diagram represents the equilibrium or rest position of the string. This is the position that the string would assume if there were no disturbance moving through it. Once a disturbance is introduced into the string, the particles of the string begin to vibrate upwards and downwards. At any given moment in time, a particle on the medium could be above or below the rest position. Points A, E and H on the diagram represent the crests of this wave. The crest of a wave is the point on the medium that exhibits the maximum amount of positive or upward displacement from the rest position. Points C and J on the diagram represent the troughs of this wave. The trough of a wave is the point on the medium that exhibits the maximum amount of negative or downward displacement from the rest position.

The wave shown above can be described by a variety of properties. One such property is amplitude. The amplitude of a wave refers to the maximum amount of displacement of a particle on the medium from its rest position. In a sense, the amplitude is the distance from rest to crest. Similarly, the amplitude can be measured from the rest position to the trough position. In the diagram above, the amplitude could be measured as the distance of a line segment that is perpendicular to the rest position and extends vertically upward from the rest position to point A.

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The wavelength is another property of a wave that is portrayed in the diagram above. The wavelength of a wave is simply the length of one complete wave cycle. If you were to trace your finger across the wave in the diagram above, you would notice that your finger repeats its path. A wave is a repeating pattern. It repeats itself in a periodic and regular fashion over both time and space. And the length of one such spatial repetition (known as a wave cycle) is the wavelength. The wavelength can be measured as the distance from crest to crest or from trough to trough. In fact, the wavelength of a wave can be measured as the distance from a point on a wave to the corresponding point on the next cycle of the wave. In the diagram above, the wavelength is the horizontal distance from A to E, or the horizontal distance from B to F, or the horizontal distance from D to G, or the horizontal distance from E to H. Any one of these distance measurements would suffice in determining the wavelength of this wave.

A longitudinal wave is a wave in which the particles of the medium are displaced in a direction parallel to the direction of energy transport. A longitudinal wave can be created in a slinky if the slinky is stretched out horizontally and the end coil is vibrated back-and-forth in a horizontal direction. If a snapshot of such a longitudinal wave could be taken so as to freeze the shape of the slinky in time, then it would look like the following diagram. Because the coils of the slinky are vibrating longitudinally, there are regions where they become pressed together and other regions where they are spread apart. A region where the coils are pressed together in a small amount of space is known as a compression. A compression is a point on a medium through which a longitudinal wave is traveling that has the maximum density. A region where the coils are spread apart, thus maximizing the distance between coils, is known as a rarefaction. A rarefaction is a point on a medium through which a longitudinal wave is traveling that has the minimum density. Points A, C and E on the diagram above represent compressions and points B, D, and F represent rarefactions. While a transverse wave has an alternating pattern of crests and troughs, a longitudinal wave has an alternating pattern of compressions and rarefactions.

As discussed above, the wavelength of a wave is the length of one complete cycle of a wave. For a transverse wave, the wavelength is determined by measuring from crest to crest. A longitudinal wave does not have crest; so how can its wavelength be determined? The wavelength can always be determined by measuring the distance between any two corresponding points on adjacent waves. In the case of a longitudinal wave, a wavelength measurement is made by measuring the distance from a compression to the next compression or from a rarefaction to the next rarefaction. On the diagram above, the distance from point A to point C or from point B to point D would be representative of the wavelength.

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Consider the diagram below in order to answer questions #1-2. 1. The wavelength of the wave in the diagram above is given by letter ______.

2. The amplitude of the wave in the diagram above is given by letter _____.

3. Indicate the interval that represents one full wavelength. a. A to C

b. B to D

c. A to G

d. C to G

## Extra Information About what is the distance from the resting position to a crest or trough in a wave called? That You May Find Interested

If the information we provide above is not enough, you may find more below here.

### The Anatomy of a Wave – The Physics Classroom • Author: physicsclassroom.com

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• Sumary: This Lesson discusses details about the nature of a transverse and a longitudinal wave. Crests and troughs, compressions and rarefactions, and wavelength and amplitude are explained in great detail.

• Matching Result: In a sense, the amplitude is the distance from rest to crest. Similarly, the amplitude can be measured from the rest position to the trough position.

• Intro: The Anatomy of a Wave A transverse wave is a wave in which the particles of the medium are displaced in a direction perpendicular to the direction of energy transport. A transverse wave can be created in a rope if the rope is stretched out horizontally and the end is…

### crest – Currents: NOAA's National Ocean Service Education • Author: oceanservice.noaa.gov

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• Sumary: National Ocean Service’s Education Online tutorial on Tides and Water levels

• Matching Result: The horizontal distance between two adjacent crests or troughs is known as the wavelength.

• Intro: Corals: NOAA’s National Ocean Service Education << Back The highest surface part of a wave is called the crest, and the lowest part is the trough. The vertical distance between the crest and the trough is the wave height. The horizontal distance between two adjacent crests or troughs is known…

### Wave Amplitude ( Read ) | Physics | CK-12 Foundation • Author: ck12.org

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• Sumary: What wave amplitude is and how to measure it, and what determines the amplitude of a wave.

• Matching Result: Amplitude (A) – the maximum displacement of a point of a wave from its rest position (the rest position to a crest or the rest position to a …

• Intro: Wave Amplitude ( Read ) | Physics We have a new and improved read on this topic. Click here to view We have moved all content for this concept to for better organization. Please update your bookmarks accordingly. To better organize out content, we have unpublished this concept. This page…

## Frequently Asked Questions About what is the distance from the resting position to a crest or trough in a wave called?

If you have questions that need to be answered about the topic what is the distance from the resting position to a crest or trough in a wave called?, then this section may help you solve it.

wavelength

### Is there a distance between the resting and trough positions?

Peak is the highest point above the rest position, Trough is the lowest point below the rest position, and Amplitude is the maximum displacement of a wave’s point from its rest position. Displacement is the distance that a specific point in the medium has moved from its rest position.

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amplitude

### Is an amplitude the distance between the peak and the valley?

Wave amplitude is always one-half the wave height (at least for a symmetric wave), and wavelength is the distance from one crest to the next crest or from one trough to the next trough. Wave amplitude is defined as the displacement of water from its undisturbed state.

### What distinguishes the peak and the valley of the wave of light?

The wave height is the overall vertical change in height between the crest and the trough, and the wavelength is the distance between two successive crests (or troughs). The highest part of the wave is called the crest, and the lowest part is called the trough.

### Which phrase describes the separation between two transverse wave crests or troughs?

The wavelength of a transverse wave is the distance between two crests or troughs.

### What is the measurement from peak to trough known as?

The Greek letter lambda (?) is used to represent wavelength, which is the distance between one peak or trough and the next. The longer the wavelength, the lower the peak of the wave will be.

### Is the distance between the crest or trough and the medium’s undisturbed position?

The wavelength l is the horizontal length of one cycle of the wave, as shown in Figure 16.6a. The amplitude is the distance between a crest, or highest point on the wave pattern, and the undisturbed position. It is also the distance between a trough, or lowest point on the wave pattern, and the undisturbed position.

### How far is the equilibrium?

Bond length, also known as bond distance, is the equilibrium separation between the two atoms that make up a covalent bond; it is typically measured in angstroms or nanometers.

### What is a wave’s resting place?

We can infer a number of wave properties from the graph: the amplitude of a wave is a measure of the displacement of the wave from its rest position; the line through the center of the wave is the resting position of the medium if there was no wave passing through.

### How far is it from peak to peak?

In alternating current (AC), the peak-to-peak value is twice the peak value or 2.828 times the root-mean-square (RMS) value. Peak-to-peak voltage is denoted by VPP. Peak-to-peak (pk-pk) is the difference between the highest and lowest values in a waveform.

### How far apart are two objects?

A separation distance is the amount of space between two Source Features of an Element that determines whether they should be included in a single (complex) Element Occurrence (EO) or should be treated separately.

### What do we refer to as the separation between equilibrium and crest?

Bigger amplitude waves have more energy. Amplitude is easy to see on a water wave; it’s the vertical distance from equilibrium to the crest (or from equilibrium to the trough). Amplitude describes the size of a wave, similar to vibrations.

### What three types of distance are there?

Three different types of distance—linear distance, temporal distance, and psychological distance—are examined by geographers when analyzing movement.