Physics

Which of the following combinations has dimensions?


ANSWER

$$ \dfrac{\sigma}{\lambda_mT} $$


SOLUTION
All the first three options are dimensionless quantity except the last one.
Since $$\left[ \sigma  \right] =\left[ { M }{ T }^{ -3 }{ K }^{ -4 } \right] ,\quad \left[ { \lambda  }_{ m } \right] =\left[ L \right] \quad \& \quad \left[ T \right] =\left[ K \right] $$
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Single Correct Medium Published on 18th 08, 2020
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