The maximum frequency of transmitted radio waves above which the radio waves are no longer reflected back by ionosphere is (N = maximum electron density of ionosphere, g = acceleration due to gravity)

Options

A. gN
B. `gN^2`
C. `gsqrtN`
D. `g^2N^2`

Answer

C

Explanation

The maximum frequency of radio waves that can be reflected back by the ionosphere is given by `gsqrt N`.
where, g=acceleration due to gravity and N= maximum electron density of ionosphere.