JEE Main & Advanced
JEE Main Paper (Held On 19 April 2014)
question_answer
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:
JEE Main Online Paper (Held On 19 April 2016)
A)80 - 150 MHz
B)8 - 25 MHz
C)1 - 3 MHz
D)150 - 1500 kHz
Correct Answer:
B
Solution :
Frequency of radio waves for sky wave propagation is 2 MHZ to 30 MHZ.