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Which one of the following frequencies ...

Which one of the following frequencies will be reflated back by the ionospheric layer having an electron density of `10^12` per `m^3` ?

A

10MHz

B

8MHz

C

6MHz

D

9MHz

Text Solution

Verified by Experts

The correct Answer is:
D
Critical Frequency `V_c=9(N_"max)^(1//2)`
`=9xx(10^12)^(1//2)`
`=9xx10^6` Hz = 9 MHz
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