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The number of particles crossing a unit ...

The number of particles crossing a unit area perpendicular to the `x - axis` in a unit time is given by `n = - D((n_(2) - n_(1))/( x_(2) - x_(1)))`, where `n_(1) and n_(2)` are the number of particles per unit volume at ` x = x_(1) and x_(2)` , respectively , and `D` is the diffusion constant. The dimensions of `D` are

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`L^2 T^(-1)`
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The number of particles is given by n = -D(n_(2) - n_(1))/( x_(2) - x_(1)) crossing a unit area perpendicular to X - axis in unit time , where n_(1)and n_(2) are particles per unit volume for the value of x meant to x_(2) and x_(1) . Find the dimensions of D called diffusion constant.

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AAKASH SERIES-UNITS AND MEASUREMENTS-NUMERICAL EXERCISE (LEVEL-2)
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