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On a particular day, the maximum frequen...

On a particular day, the maximum frequency reflected from the ionosphere is 10MHz. After 10 days, it increaesed to 11 MHz. What is the ratio of the maximum electron density of the ionosphere on these two days ?

A

`11/10`

B

`11/10`

C

`(11/10)^2`

D

`(10/11)^(1//2)`

Text Solution

Verified by Experts

The correct Answer is:
C
The critical frequency `f_C=9sqrt(N_"max")`
where `N_"max"` is the maximum electron density of the ionosphere .
`therefore f_C^2=81(N_"max")`
`therefore N_"max" = f_C^2/81` i.e. `N_"max" prop f_C^2`
`therefore (N_m)^2/(N_m)^1=(11)^2/(10)^2 =(11/10)^2`
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