The refractive index of the ionosphere for radio wave is
Answers
Answer:
The sky waves are the radio waves of frequency range between 2 MHz to 30 MHz. The ionosphere reflects these radio waves back to earth during their propagation through atmosphere. The refractive index of ionosphere is less than its free space value. That is, it behaves as a rarer medium.
Answer:
During the day the F layer splits into two layers called the F1 and F2 layers, while the D layer vanishes completely at night. Radio waves below 40 MHz are significantly affected by the ionosphere, primarily because radio waves in this frequency range are effectively reflected by the ionosphere.
Due to the ability of ionized atmospheric gases to refract high frequency (HF, or shortwave) radio waves, the ionosphere can reflect radio waves directed into the sky back toward the Earth. Radio waves directed at an angle into the sky can return to Earth beyond the horizon.