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- -- card: 32131 from stack: in
- -- bmap block id: 0
- -- flags: 4000
- -- background id: 4601
- -- name: #97
- ----- HyperTalk script -----
- on openCard
- global group,rightone
- put 9 into group
- put "D" into rightone
- pass openCard
- end openCard
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- -- part contents for background part 20
- ----- text -----
- Question #9
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- -- part contents for background part 1
- ----- text -----
- 3BC-6.4 What makes backscatter signals often sound distorted?
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- -- part contents for background part 11
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- Auroral activity and changes in the earth's magnetic field
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- -- part contents for background part 27
- ----- text -----
- The propagation through ground waves that absorb much of the signal's clarity
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- -- part contents for background part 28
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- The earth's E-layer at the point of radio wave refration
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- -- part contents for background part 29
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- The small part of the signal's energy scattered back to the transmitter skip zone through several radio-wave paths