A ray of light that strikes a surface is known as the <em>incident ray. (d)</em>
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The age of earth is determined truly by the RADIOCARBON MATHOD . In this method we can find the actuall age of anything having carbon .
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C is the answer hope it help
Salt, in chemistry, substance produced by the reaction of an acid with a base. A salt consists of the positive ion (cation) of a base and the negative ion (anion) of an acid. The reaction between an acid and a base is called a neutralization reaction. Hope this helps!!!