3.Give the reason for the following:
(a) Silver is used in making mirrors.
(b) Aluminium is used to make electrical wires.
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Explanation:
A) Because silver is shiny and is a good reflector. It reflects about 90 percent of light falling on it. That is why, it is used for making high reflecting mirrors. one surface of the mirror is silvered because it helps the light rays to reflect.
B) Aluminum provides a better conductivity to weight ratio than copper, and therefore is also used for wiring power grids, including overhead power transmission lines and local power distribution lines, as well as for power wiring of some airplanes. ... It has cost and weight advantages over copper wires.
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