THE+ELECTROMAGNETIC+SPECTRUM

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**THE ELECTROMAGNETIC SPECTRUM SONG** media type="custom" key="9188400" 3.10 understand that light is part of a continuous electromagnetic spectrum which includes radio, microwave, infra-red, visible, ultraviolet, X-ray and gamma ray radiations and that all these waves travel at the same speed in free space.

ACTIVITY: RESEARCH THE ELECTROMAGNETIC SPECTRUM
 * 1) Watch the Electromagentic Spectrum Song (with headphones) and visit the website links below.
 * 2) For each type of radiation mentioned in 3.9 above (and the song), describe and illustrate all of the types. Use all of the websites and Google images.
 * 3) Write notes and illustrate for each the uses and dangers of each type.


 * WAVE TYPE || PICTURE || USES || DANGERS ||
 * X-ray ||  || Medical - seeing inside bodies || Overexposure can lead to cell damage ||

[|EM SPECTRUM APPLET ON PASSMYEXAMS.CO.UK]



ELECTROMAGNETIC SPECTRUM: The range of electromagnetic waves ordered by frequency and wavelength. Includes light, heat, radio, gamma rays, microwaves, X-rays

WHAT IS AN EM WAVE? APPLET

3.11 recall the order of the electromagnetic spectrum in decreasing wavelength and increasing frequency, including the colours of the visible spectrum

[|LYRICS OF ROY G BIV] Song by They Might be Giants

LEARN ABOUT THE USES AND EFFECTS OF EM WAVES WITH THE LINKS BELOW:

ELECTROMAGNETIC SPECTRUM APPLET [|LINK TO NASA WEBSITE ABOUT EM SPECTRUM] [|A GOOD GCSE SITE WITH A QUIZ ABOUT EM SPECTRUM]

3.12 recall some of the uses of electromagnetic radiations, including • radio waves: broadcasting and communications • microwaves: cooking and satellite transmissions • infra-red: heaters and night vision equipment • visible light: optical fibres and photography • ultraviolet: fluorescent lamps • X-rays: observing the internal structure of objects and materials and medical applications • gamma rays: sterilising food and medical equipment

[|X-RAY ARTIST'S PICS]

3.13 recall the detrimental effects of excessive exposure of the human body to electromagnetic waves, including • microwaves : internal heating of body tissue • infra-red : skin burns • ultraviolet : damage to surface cells and blindness • gamma rays : cancer, mutation