This question has Statement-1 and Statement-2. Of 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. |
[JEE ONLINE 22-04-2013] |
A) Statement 1 is true, Statement 2 is false
B) Statement 1 is false, Statement 2 is true
C) Statement 1 is true, Statement 2 is true but Statement 2 is not the correct explanation of Statement 1
D) Statement 1 is true, Statement 2 is true but Statement 2 is the correct explanation of Statement 1
Correct Answer: A
Solution :
[a] Effective refractive index of the ionosphere |
where f is the frequency of cm waves |
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