question_answer 32)

    The maximum frequency for reflection of sky waves from a certain layer of the ionosphere is found to be where  is   the, maximum electron density at that layer  of the ionosphere. On a certain day it is observed that signals of frequencies higher than 5 MHz are not received by reflection from the F1 layer of the ionosphere while signals of frequencies higher than 8 MHz are not received by reflection from the F2 layer of the ionosphere. Estimate the maximum electron densities of the F1 and F2 layers on that day.

Answer:

                  For F1 layer:   or For F2 layer:  or