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  • Refractive index of ionosphere Option: 1 Increases with height from earth Option: 2

Refractive index of ionosphere 

Option: 1

Increases with height from earth 


Option: 2

Decrease with height from earth 


Option: 3

first decrease , then increase with height 


Option: 4

first increase , then decrease with height 


Answers (1)

best_answer

As we have learned

Variation of refractive index -

As we go deep into the ionosphere N increases so neff  decreases

- wherein

The refraction of beam will continue and finally it reflects back .

 

 Refractive index of ionosphere varies with electron  density \eta = [ 1- \frac{80.5 n}{f^2}]^{1/2}                                                                                        Where  N = where N=elcetron density 

In an ionosphere at highest layers , solar radiation is intense but there are few moleucules to be ionised

At bottom layers , even though the molecular cocentration is high the solar radiation is low resulting in poor electron density 

In intermediate layer electron density is high due to suffiecient molar concentration and adequate solar intensity 

Hence , it may be seen that electron density firsrt increase , then decrese with height and refractive index decrease first then increase with height 

 

 

 

 

 

 

 

 

Posted by

Kuldeep Maurya

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