Question 15

To find the distance d over which a signal can be seen clearly in foggy conditions, a railways engineer uses dimensional analysis and assumes that the distance depends on the mass density $$\rho$$ of the fog, intensity (power/area) SS of the light from the signal and its frequency f. The engineer finds that disproportional to $$S^{\frac {1}{n}}$$. The value of n is

Correct Answer: 3

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