-- card: 29260 from stack: in
-- bmap block id: 0
-- flags: 4000
-- background id: 4601
-- name: #86
----- HyperTalk script -----
on openCard
  global group,rightone
  put 8 into group
  put "D" into rightone
  pass openCard
end openCard



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Question #8

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3BC-1.13 What is the "critical angle", as used in radio wave propagation?

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The lowest take off angle that will return a radio wave to earth under specific ionospheric conditions

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The compass direction of the desired DX station from your location

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The 180-degree-inverted compass direction of the desired DX station from your location

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The highest take off angle that will return a radio wave to earth during specific ionospheric conditions