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Description |
- Is it really yellow?With LED.line alongside the LED.mixer, students can use a simple spectroscope to explore the difference between light from the yellow LED, and yellow light produced by mixing red and green light. Use the LED.line with a spectrometer (B8A4637) to make measurements of the wavelength of light for a range of colours.. The COM is an easy-to use instrument providing information on microwave emissions in the users local environment, including those from mobile and cordless phones, antenna masts and microwave ovens. This is an area of concern for many and while the debate about the degree of hazard associated with microwave radiations is continuing, it makes sense to understand the strength of signals emitted and learn how risk can be minimised. For the first time, teachers and students can access meaningful data with which to investigate this highly topical issue. COMs colourful and easy-to-read display shows 10 microwave signal levels between 0.7 and 6.5V/m, the maximum that people should be exposed to. The range covers the recent precautionary advice levels given by Switzerland, Italy and Powerwatch (NGO). The scale is coloured in green-yellow-red for ease of understanding of how the precautionary principle is applied.
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