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If f c is the critical frequency of ra...

If f c is the critical frequency of radio waves for reflection by the ionosphere and N max is the density of free electrons in the ionosphere

A

`f_(c)prop N_("max")`

B

`f_(c)prop(1)/(N_("max"))`

C

`f_(c)prop(1)/sqrt(N_("max"))`

D

`f_(c)propsqrt(N_("max"))`

Text Solution

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The correct Answer is:
D
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