V4 thN(h)A uniform plane electromagnetic wave of frequency f= 5MHz emitted by an antenna at the earth'ssurface is incident normally on a layer of the ionosphere whose concentration of free electrons can beapproximated by the following lincar function of the latitude above the carth's surface:(h – h;)N(h) = No(h, – h,)For h Shsh;, where h=100 km, h;=200 km and N= 5 x 10'" m³. Find the highest altitude h reached bythe wave, at which it bounces off and returns to the antenna.

Given The highest h reached by the wave.

N N(h) A uniform plane electromagnetic wave of frequency f= 5MHZ emitted by an antenna at the earth's surface is incident normally on a layer of the ionosphere whose concentration of free electrons can be approximated by the following linear function of the latitude above the earth's surface: (h – h;) (h2 – h1) N (h) = No For hShsh, where h=100 km, h;=200 km and N= 5 x 10'" m²³. Find the highest altitude h reached by the wave, at which it bounces off and returns to the antenna.

N N(h) A uniform plane electromagnetic wave of frequency f= 5MHZ emitted by an antenna at the earth's surface is incident normally on a layer of the ionosphere whose concentration of free electrons can be approximated by the following linear function of the latitude above the earth's surface: (h – h;) (h2 – h1) N (h) = No For hShsh, where h=100 km, h;=200 km and N= 5 x 10'" m²³. Find the highest altitude h reached by the wave, at which it bounces off and returns to the antenna.