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Explain linear expansion of solid....

Explain linear expansion of solid.

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Linear expansion : In solids, for a small change in temperature `Delta T` , the fractional change in length `((DeltaL)/(L_0) )` is directly proportional to `Delta T`
`(DeltaL)/(L_0) = alpha_L Delta T`
therefore `alpha_L = (Delta T)/(L_0 Delta T)`
where `alpha_L` = cofficient of linear expansion , `Delta L = ` change in length L = original length `Delta T` = change in temperature
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