A diathermy machine, used in physiotherapy, generates...

Name: Problem 60, Chapter 21: College Physics
Uploaded: 2019-11-16T18:35:57-08:00
Duration: 40 s
Channel: Averell Hause
Description: A diathermy machine, used in physiotherapy, generates electromagnetic radiation that gives the effect of “deep heat” when absorbed in tissue. One assigned frequency for diathermy is 27.33 MHz. What is the wavelength of this radiation?

A diathermy machine, used in physiotherapy, generates electromagnetic radiation that gives the effect of “deep heat” when absorbed in tissue. One assigned frequency for diathermy is 27.33 MHz. What is the wavelength of this radiation?

Key Concepts

Electromagnetic Radiation

Electromagnetic radiation refers to waves of energy that propagate through space, carrying electromagnetic radiant energy. These waves include a broad spectrum ranging from radio waves to gamma rays, and they are characterized by properties such as wavelength and frequency. Their propagation is not dependent on a medium, and in a vacuum, they travel at a constant speed known as the speed of light.

Frequency

Frequency is the measure of how often a wave’s oscillations occur per unit time, typically expressed in hertz (Hz), where one hertz is equivalent to one cycle per second. For electromagnetic waves, frequency determines the energy of the wave and is inversely related to the wavelength.

Wavelength

Wavelength is the distance between two consecutive points in phase on a wave, such as from crest to crest or trough to trough. In the context of electromagnetic waves, the wavelength is a fundamental property that, along with frequency, defines the characteristics of the radiation. Shorter wavelengths correspond to higher frequencies and vice versa.

Wave Equation

The wave equation, expressed as ? = c / f, connects the wavelength (?) of an electromagnetic wave to its frequency (f) using the speed of light (c). This equation is fundamental in wave physics, allowing for the computation of one property when the other is known, and it illustrates the inverse relationship between frequency and wavelength.

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