Multiple choice

If the refraction index decreases with height over a portion of the range of height, the rays will be curved downwards. Here, which of the following conditions can occur?

  1. Trapping of duct propagation

  2. Low power low antenna approach

  3. Tropospheric refraction

  4. Power consumption

  5. Interoperable
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A Correct answer
Explanation

If the refraction index decreases with height over portion of the range of height, the rays will be curved downwards and then trapping of duct propagation can occur.

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