JEE Main2014PhysicsCommunication SystemActual
Long-range radio transmission is possible when the radio waves are reflected from the ionosphere. For this to happen the frequency of the radio waves must be in the range:
Options
- A150 - 500   kHz
- B80 - 150   MHz
- C1 - 3   MHz
- D8 - 25   MHz
Correct answer
D. 8 - 25   MHz
Step-by-step solution
Skywaves get reflected from the ionosphere having frequency 3   MHz to 40   MHz .