Difference between revisions of "4Wave-7"
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Mrsaunders (Talk | contribs) (New page: ==Outcomes== * Pupils can identify the sections of the electromagnetic spectrum. * Pupils can identify the uses and dangers of sections of the electromagnetic spectrum. ==[[Specifications|...) |
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===Skills Addressed=== | ===Skills Addressed=== | ||
===Safety/Hazards=== | ===Safety/Hazards=== | ||
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===Notes=== | ===Notes=== |
Latest revision as of 13:21, 30 October 2011
Contents
Outcomes
- Pupils can identify the sections of the electromagnetic spectrum.
- Pupils can identify the uses and dangers of sections of the electromagnetic spectrum.
Specification References
- 3.10 understand that light is part of a continuous electromagnetic spectrum which includes radio, microwave, infrared, visible, ultraviolet, x-ray and gamma ray radiations and that all these waves travel at the same speed in free space
- 3.11 recall the order of the electromagnetic spectrum in decreasing wavelength and increasing frequency, including the colours of the visible spectrum
- 3.12 recall some of the uses of electromagnetic radiations:
- 3.13 recall the detrimental effects of excessive exposure of the human body to electromagnetic waves:
Starter
- Show pupils EM spectrum circus.
Main Body of Lesson
- Assign each group of pupils two sections of the EM spectrum, pupils should find the uses of one section and the dangers of another (AGR has hand-out cards for pupils).
- Pupils present uses and dangers to the class.
- During talks pupils should make rough notes, which will then be made into neat notes for homework.
- Alternatively go through the following with the group:
Uses
- Radio - communication
- Microwave - communication, energy transfer (e.g. microwave oven, solar satellite)
- Infrared - thermal energy transfer, night vision
- Visible
- Ultraviolet - sterilisation, tanning,
- X-ray - medical (diagnosis), x-ray diffraction (crystallography)
- Gamma ray - sterilisation, medical (treatment)
Dangers
- Radio - negligible hazard (possibly KISS FM)
- Microwave - negligible hazard, internal heating
- Infrared - surface heating
- Visible
- Ultraviolet - blindness, sunburn
- X-ray - blindness, cancers (mutation)
- Gamma ray - blindness, cancers (mutation)
Have pupils produce a mnemonic to help remember the order of the EM spectrum. The odder the better. E.g. red monkeys in Vietnam use xylophones greatly.
Plenary
- Use Jodrell Bank's Chromoscope to explore the sky in different parts of the spectrum.
Homework
- Using rough notes created in class, combined with textbook/internet, pupils create neat notes on uses/dangers of each section of the EM spectrum.
Additional Information
Resources Required
Textbook References
- Pople 7.11 pp. 160-163
Website References
Skills Addressed
Safety/Hazards
Exposure to intense UV Radioactive source handling