What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the F2 region?
The correct answer is C: 2,500 miles. The approximate maximum distance along the Earth's surface normally covered in one hop using the F2 region is 2,500 miles. F2 is the highest ionospheric region, providing the longest single-hop distance. For amateur radio operators, this helps explain F2 propagation range. Understanding this helps when planning long-distance contacts.
Exam Tip
F2 single-hop distance = 2,500 miles. Think 'F'2 = 'F'urthest single-hop ('2',500 miles). F2 region provides longest single-hop distance - approximately 2,500 miles. Not 180 (ground wave), not 1,200 (E region), not 12,000 (multiple hops).
Memory Aid
"F2 single-hop distance = 2,500 miles. Think 'F'2 = 'F'urthest single-hop ('2',500 miles). F2 region provides longest single-hop distance - approximately 2,500 miles. Highest ionospheric region provides longest range."
Real-World Application
You make a contact 2,200 miles away on 20 meters using F2 region propagation. This is within the F2 single-hop range (about 2,500 miles maximum). The F2 region is the highest ionospheric layer, providing the longest single-hop distances. For longer distances, multiple hops are needed.
Key Concepts
Why Other Options Are Wrong
Option A (180 miles): Incorrect. 180 miles is too short - that's more like ground wave or E-region distance. F2 provides much longer distances.
Option B (1,200 miles): Incorrect. 1,200 miles is E-region distance, not F2. F2 provides longer distances than E region.
Option D (12,000 miles): Incorrect. 12,000 miles is way too long - that would require multiple hops. F2 single-hop is about 2,500 miles.
题目解析
The correct answer is C: 2,500 miles. The approximate maximum distance along the Earth's surface normally covered in one hop using the F2 region is 2,500 miles. F2 is the highest ionospheric region, providing the longest single-hop distance. For amateur radio operators, this helps explain F2 propagation range. Understanding this helps when planning long-distance contacts.
考试技巧
F2 single-hop distance = 2,500 miles. Think 'F'2 = 'F'urthest single-hop ('2',500 miles). F2 region provides longest single-hop distance - approximately 2,500 miles. Not 180 (ground wave), not 1,200 (E region), not 12,000 (multiple hops).
记忆口诀
F2 single-hop distance = 2,500 miles. Think 'F'2 = 'F'urthest single-hop ('2',500 miles). F2 region provides longest single-hop distance - approximately 2,500 miles. Highest ionospheric region provides longest range.
实际应用示例
You make a contact 2,200 miles away on 20 meters using F2 region propagation. This is within the F2 single-hop range (about 2,500 miles maximum). The F2 region is the highest ionospheric layer, providing the longest single-hop distances. For longer distances, multiple hops are needed.
错误选项分析
Option A (180 miles): Incorrect. 180 miles is too short - that's more like ground wave or E-region distance. F2 provides much longer distances. Option B (1,200 miles): Incorrect. 1,200 miles is E-region distance, not F2. F2 provides longer distances than E region. Option D (12,000 miles): Incorrect. 12,000 miles is way too long - that would require multiple hops. F2 single-hop is about 2,500 miles.
知识点
F2 region, Single-hop distance, 2,500 miles, Maximum distance
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.