Propagation

Explanation of question 9

Ground wave propagation is the usual mode

  1. below 2MHz
  2. between 1 and 30MHz
  3. between 30 and 50MHz
  4. above 50MHz

The answer is :- 1 Ground wave propagation is the normal mode below about 2 MHz. Ionospheric wave propogation is the normal mode between about 1 MHz and 30 MHz.

Tropospheric propagation is the normal mode above about 50 MHz.

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