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Two rods of length L1 and L2 are made up...

Two rods of length `L_1` and `L_2` are made up of different material whose coefficient of linear expansion are `alpha_1` and `alpha_2` respectively. The difference between their lengths will be independent of temperature if `L_1/L_2` is equal to.

A

`(alpha_1)/(alpha_2)`

B

`((alpha_1)/(alpha_2))^(1/2)`

C

`(alpha_2)/(alpha_1)`

D

`((alpha_2)/(alpha_1))^(1/2)`

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