Question

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)
A. gN
B. `gN^(2)`
C. `gsqrt(N)`
D. `g^(2)N^(2)`

Answer 1

Correct Answer - C
Critical frequency is given by
`f_(C)=gsqrtN`.