ACTIVITY 6
1. The diagram below
shows the electromagnetic spectrum. Region D represent visible light.
a) Which region represents radiation capable of promoting the
production of vitamin D in the skin?
b) Which region contains radiation used in radar systems?
c) Which region contains radiation produced in nuclear reactors?
2. About 50% of the radiation emitted by the sun is visible light
with in thus visible light, the wavelength that the sun emits the most of
approximately 50 x 10-9 M. What is the frequency of this light?
3. How long does it take for radio signals sent from the earth to
reach at a distance of 3.84 x 106 m?
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