A bar magnet XY is freely suspended in a horizontal position so that end X points north and end Y points south. What is the magnetic polarity end Y or end X? What height will it travel upwards before it starts to reverse its direction? At Scoodle we understand that everyone learns in a different way.
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In transverse waves, the distance between two adjacent crests or troughs is called the wavelength BUT in longitudinal waves, the distance between two neighboring compressions and rarefactions is the wavelength.
Waves are described using the following terms:. Types of waves Waves are one of the ways in which energy may be transferred between stores. For example: sound waves cause air particles to vibrate back and forth ripples cause water particles to vibrate up and down The direction of these oscillations is the difference between longitudinal or transverse waves. Light waves are the topic of another unit at The Physics Classroom Tutorial. While the basic properties and behaviors of light will be discussed, the detailed nature of an electromagnetic wave is quite complicated and beyond the scope of The Physics Classroom Tutorial.
A mechanical wave is a wave that is not capable of transmitting its energy through a vacuum. Mechanical waves require a medium in order to transport their energy from one location to another. A sound wave is an example of a mechanical wave. Sound waves are incapable of traveling through a vacuum. Slinky waves, water waves, stadium waves, and jump rope waves are other examples of mechanical waves; each requires some medium in order to exist.
A slinky wave requires the coils of the slinky; a water wave requires water; a stadium wave requires fans in a stadium; and a jump rope wave requires a jump rope.
The above categories represent just a few of the ways in which physicists categorize waves in order to compare and contrast their behaviors and characteristic properties. This listing of categories is not exhaustive; there are other categories as well. The five categories of waves listed here will be used periodically throughout this unit on waves as well as the units on sound and light. A transverse wave is transporting energy from east to west. The particles would be moving back and forth in a direction perpendicular to energy transport.
The waves are moving westward, so the particles move northward and southward. A wave is transporting energy from left to right. The particles of the medium are moving back and forth in a leftward and rightward direction. The particles are moving parallel to the direction that the wave is moving. This must be a longitudinal wave. The fans will need to sway side to side. Thus, as the wave travels around the stadium they would be moving parallel to its direction of motion.
If they rise up and sit down, then they would be creating a transverse wave. Mechanical waves require a medium in order to transport energy. Sound, like any mechanical wave, cannot travel through a vacuum. A science fiction film depicts inhabitants of one spaceship in outer space hearing the sound of a nearby spaceship as it zooms past at high speeds.
Critique the physics of this film. This is an example of faulty physics in film. Sound is a mechanical wave and could never be transmitted through the vacuum of outer space. If you strike a horizontal rod vertically from above, what can be said about the waves created in the rod?
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