Electromagnetic spectrum
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Electromagnetic Spectrum

Related Questions
Core-1 Describe the main features of the electromagnetic spectrum and state that all e.m. waves travel with the same high speed in vacuo.  
Sup-1 State the approximate values of the speed of electromagnetic waves.  
Sup-2 use the term monochromatic    

Electromagnetic Spectrum

  1. What are the bands of an electromagnetic spectrum?
    Radio waves, Microwaves, Infrared waves, Visible light, Ultra violet, X-ray, Gamma ray.
    Of all the electromagnetic waves, light is the only portion of waves that can be detected by the human eye.

    Electromagnetic waves and light

  2. List some of the properties of electromagnetic waves.

    1. Travel in straight lines

    2. Have a constant speed of 300,000,000 m/s.

    3. They are transverse waves

    4. They propagate in vacuum.

  3. List some applications in ourlives to the following bands of the electromagnetic spectrum

    1. Radio waves: wireless-communication

    2. Microwaves: Radar, Telemetry, Electron spin resonance

    3. Infrared waves: remote control, heat, night-sight

    4. Visible light: Stimulate the retina, Affects Photoelectric film, Initiate Photo-synthesis 

    5. Ultra violet: ionization, florescence, chemical reactions, Produce Photoelectric effect, Fluorescent tubes, Photographic film

    6. X-ray: destroy cancer cells, locate bone fractures, internal imperfections of welded joints, structure of complex molecules. 

    7. Gamma ray: 

  4. List how bands of the electromagnetic spectrum are detected.

    1. Radio waves: radio receivers

    2. Microwaves: crystal detectors

    3. Infrared waves: Thermopile, Special photographic film

    4. Visible light: eye, Photoelectric cell, photographic film

    5. Ultra violet: Photoelectric cell, Fluorescent tubes, Photographic film

    6. X-ray: Geiger-Muller tube, Ionization chamber, solid state detectors, photographic film, Scintillation counters

    7. Gamma ray: Geiger-Muller tube, Ionization chamber, solid state detectors, photographic film, Scintillation counters  

  5. List some sources for the following bands of the electromagnetic spectrum

    1. Radio waves: electronic circuits: transmitters 

    2. Microwaves: electronic circuits

    3. Infrared waves: special LED electronic components, special electric gas lamps

    4. Visible light: lamps, fire 

    5. Ultra violet: special electric gas lamps

    6. X-ray: special CRT  

    7. Gamma ray: isotopes of radioactive elements

 

For more information write: abumsamh@emirates.net.ae
Created SEP 1, 2000
Copyright © 2000
Designed by: R. K. Abu-Msameh
Last modified: December 30, 2000