Question
When a meteor strikes the Earth’s atmosphere, a linear ionized region is formed at what region of the ionosphere?
Answer Options
- A) The E region
- B) The F1 region
- C) The F2 region
- D) The D region
Correct Answer: A
Explanation
Meteor scatter communication relies on the brief, temporary reflection of VHF radio signals off the ionized trails left by tiny meteors as they burn up in the upper atmosphere. The region of the atmosphere where these meteors vaporize and create the necessary ionization is a specific layer of the ionosphere.
This phenomenon occurs in the E region (or E layer) of the ionosphere, which is located at an altitude of approximately 90 to 120 kilometers (55 to 75 miles) above the Earth’s surface. Meteors typically vaporize at this altitude, leaving behind a short-lived, dense trail of plasma that acts as a highly effective mirror for VHF signals for a few seconds or less.
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