1.Previous
3.Next

these molecules largely absorb the mid-infrared radiation that heads towards Earth.

Ionosphere

The radio window's lower frequency limit is greatly affected by the ionospheric refraction of the radio waves whose frequencies are approximately below 30 MHz (? > 10 m); radio waves with frequencies below the limit of 10 MHz (? > 30 m) are reflected back into space by the ionosphere. The lower limit is proportional to the density of the ionosphere's free electrons

1.Previous
3.Next