Plasma oscillations in the ionosphere. The plasma density in the lower ionosphere has been measured during satellite reentry to be about a) 10¹8 m-³ at 50 km altitude, b) 10¹7 m-³ at 70 km and c) 10¹4 m³ at 85 km. Use the formula for the electron plasma frequency to compute its numerical value for each of these three altitudes, AND state (we'll address this quantitatively later, when we get to EM wave propagation in plasmas) why the ionosphere is a relevant consideration for radio communications both on earth and between earth and interplanetary spacecraft.
Plasma oscillations in the ionosphere. The plasma density in the lower ionosphere has been measured during satellite reentry to be about a) 10¹8 m-³ at 50 km altitude, b) 10¹7 m-³ at 70 km and c) 10¹4 m³ at 85 km. Use the formula for the electron plasma frequency to compute its numerical value for each of these three altitudes, AND state (we'll address this quantitatively later, when we get to EM wave propagation in plasmas) why the ionosphere is a relevant consideration for radio communications both on earth and between earth and interplanetary spacecraft.
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Transcribed Image Text:2. Plasma oscillations in the ionosphere. The plasma density in the lower ionosphere has
been measured during satellite reentry to be about a) 10¹8 m-³ at 50 km altitude, b) 10¹7
m-³ at 70 km and c) 10¹4 m²³ at 85 km. Use the formula for the electron plasma
frequency to compute its numerical value for each of these three altitudes, AND state
(we'll address this quantitatively later, when we get to EM wave propagation in
plasmas) why the ionosphere is a relevant consideration for radio communications both
on earth and between earth and interplanetary spacecraft.
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