PRACTICAL APPLICATIONS OF EM WAVES
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Questions and Answers

Bundle of energy called?

Photon

Are transverse waves that carry energy from one place to another

Electromagnetic waves

Longest wavelength in the electromagnetic spectrum

Radio waves

First commercial electrical telegraph in Europe

<p>Charles wheatstone and william fothergill</p> Signup and view all the answers

what is AM meaning?

<p>Amplitude modulation</p> Signup and view all the answers

What is FM meaning?

<p>Frequency modulation</p> Signup and view all the answers

Is a rate of oscillation

<p>Radio frequency</p> Signup and view all the answers

KHZ meaning?

<p>Kilohertz</p> Signup and view all the answers

First fixed semaphore system was developed in?

<p>Europe</p> Signup and view all the answers

Electrical telegraphy was an electrochemical telegraph created by?

<p>Samuel Thomas von Sommering</p> Signup and view all the answers

On laboratory scale, radiowave propagation

<p>Heinrich rudolf hertz</p> Signup and view all the answers

Own version of the same technology

<p>Samuel morse</p> Signup and view all the answers

Who showed mathematically that electromagnetic waves would propagate through free space?

<p>James clerk maxwell</p> Signup and view all the answers

1876, Conventional telephone was invented by

<p>alexander Graham bell</p> Signup and view all the answers

Radio and television

<p>James lindsay</p> Signup and view all the answers

In ,, Scottish inventor, john logie baird his device was know as?

<p>October, 1925 mechanical television</p> Signup and view all the answers

Example of EM RADIATION

<p>-microwaves, infrared, ultraviolet light, x-rays l, gamma rays</p> Signup and view all the answers

Two types of EM RADIATION

<p>Visible light and radio waves</p> Signup and view all the answers

Different types of EM RADIATION

<p>microwaves, radiowaves, Infrared waves, ultra violet, visible light, gamma rays, x-rays</p> Signup and view all the answers

In the case of very hot objects

<p>Thermography or pyrometry</p> Signup and view all the answers

Is EM radiation with a wavelength shorter than that of visible light, but longer than X-rays

<p>Ultraviolet</p> Signup and view all the answers

He discovered in 1800 the existence of infrared

<p>William herschel</p> Signup and view all the answers

High frequency radio waves and are used in telecommunication, such as mobile phones

<p>Microwaves</p> Signup and view all the answers

Is also used in electron paramagnetic resonance spectroscopy

<p>Microwave radiation</p> Signup and view all the answers

Is the portion of EM radiation that is visible to the human eye

<p>Visible light</p> Signup and view all the answers

Longest wavelength color?

<p>Red</p> Signup and view all the answers

Shortest wavelength color

<p>Violet</p> Signup and view all the answers

Overexposure to UV lead to?,,___,,_________

<p>Skin cancer, melanoma, eye problems, photokeratitis, sunburn of cornea</p> Signup and view all the answers

Multiple Concentrated beams of gamma rays or directed at the growth in order to kill the cancerous cells

<p>Gamma knife surgery</p> Signup and view all the answers

Are generated by radioactive atoms

<p>Gamma rays</p> Signup and view all the answers

With the technique called?

<p>Computer-assisted tomography</p> Signup and view all the answers

Is closer to the microwave region of EM spectrum

<p>Infrared</p> Signup and view all the answers

Example of non-ionizing radiation

<p>Visible light, infrared, ultraviolet, microwaves, radiowaves</p> Signup and view all the answers

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