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Mechanical waves

## Do mechanical waves require a medium?

Sound and water waves are mechanical waves; meaning, they require a medium to travel through. The medium may be a solid, a liquid, or a gas, and the speed of the wave depends on the material properties of the medium through which it is traveling.

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## Do light waves require a medium?

We know that light doesn’t need a medium through which to travel because the speed of light is experimentally constant: independent of the movement of the source or detector or the direction in which it travels. Light contrasts with sound, which travels through the air (or some other material medium).

## What are examples of transverse and longitudinal waves?

Examples of transverse waves include vibrations on a string and ripples on the surface of water. We can make a horizontal transverse wave by moving the slinky vertically up and down. In a longitudinal wave the particles are displaced parallel to the direction the wave travels.

## What are 3 examples of a longitudinal wave?

Examples of longitudinal waves include: sound waves. ultrasound waves….Transverse waves

• ripples on the surface of water.
• vibrations in a guitar string.
• a Mexican wave in a sports stadium.
• electromagnetic waves – eg light waves, microwaves, radio waves.
• seismic S-waves.

## What is transverse wave and example?

Transverse wave, motion in which all points on a wave oscillate along paths at right angles to the direction of the wave’s advance. Surface ripples on water, seismic S (secondary) waves, and electromagnetic (e.g., radio and light) waves are examples of transverse waves.

## Why light is a transverse wave?

Light is a wave in which an electric field propagates in vacuum or inside a medium. All electromagnetic waves, including light, are transverse waves because they vibrates energy in a direction perpendicular to the direction in which the wave is travelling.

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## What best describes a transverse wave?

What best describes a transverse wave? They move perpendicular and parallel to the direction of wave motion.

## What are 4 basic properties of waves?

However, all waves have common properties—amplitude, wavelength, frequency, and speed. Amplitude describes how far the medium in a wave moves. Wavelength describes a wave’s length, and frequency describes how often it occurs. Speed describes how quickly a wave moves.

## What is a scalar wave?

A scalar wave (hereafter SW) is just another name for a “longitudinal” wave. The term scalar is sometimes used instead because the hypothetical source of these waves is thought to be a “scalar field” of some kind, similar to the Higgs field for example.

## What are the 7 electromagnetic waves in order?

In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves. Microwaves (like the ones used in microwave ovens) are a subsection of the radio wave segment of the EM spectrum.

P-waves

Gamma rays

violet

## Why gamma rays has largest penetrating power?

The great penetrating power of gamma rays stems from the fact that they have no electric charge and thus do not interact with matter as strongly as do charged particles. At the same time, this property makes gamma rays extremely hazardous.

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## What is the penetrating power?

“Penetrating power” is defined as the power (length) of an electron beam transmitted for a substance. In the case of a TEM, electrons that do not pass through the objective aperture are regarded to be absorbed.

γ-rays

## What is the least penetrating radiation?

Alpha, beta and gamma radiations penetrate materials in different ways.

• Alpha radiation. Alpha radiation is the least penetrating. It can be stopped (or absorbed) by a sheet of paper or a human hand.