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Electromagnetic waves of frequencies hig...

Electromagnetic waves of frequencies higher than `9sqrt(2)` MHz are found to be not reflected by the ionosphere on a particular day at a place. The maximum electron density in the ionosphere is :

A

`sqrt(2)xx10^(12)//m^(3)*`

B

`sqrt(5)xx10^(12)//m^(3)*`

C

`2xx10^(12)//m^(3)*`

D

`3xx10^(12)//m^(3)*`

Text Solution

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The correct Answer is:
C
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