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This question has Statement-1 and Statement-2. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement-1: Short wave transmission is achieved due to the total internal reflection of the e-m wave from an appropriate height in the ionosphere. Statement-2: Refractive index of a plasma is independent of the frequency of e-m waves.

Options

  1. AStatement-1 is true, Statement- 2 is false.
  2. BStatement-1 is false, Statement- 2 is true.
  3. CStatement-1 is true, Statement- 2 is true but Statement -2 is not the correct explanation of statement-1.
  4. DStatement-1 is true, Statement-2 is true and Statement -2 is the correct explanation of Statement-1.

Correct answer

A. Statement-1 is true, Statement- 2 is false.

Step-by-step solution

Effective refractive index of the ionosphere n _ eff = n ₀ [1- 80.5 ~N f ^2 ]^ 1 / 2 where f is the frequency of em waves

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