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

Asked by Anil | 22nd May, 2017, 09:38: PM

Expert Answer:

To find the distance d over which a signal can be seen clearly in foggy conditions, a railways engineer uses dimensional and assumes that the distance depends on the mass density p of the fog, intensity (power/area) S of the light from the signal and its frequency f. The engineer finds that d is proportional to S1/n .
The value of 'n' can be calculated by analysing the dimensions of the given physical quantities and their inter-relationship as follows:


Therefore, the value of 'n' is 3.

Answered by Abhijeet Mishra | 23rd May, 2017, 12:02: PM