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Home Q & A Board Science-Related Homework Help Engineering Electrical Engineering
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lindseyb1220 lindseyb1220
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6 years ago
The highest frequency that is returned to Earth when transmitted vertically under given ionospheric conditions is called the ____________.
 
  A. critical angle
  B. maximum usable frequency
  C. critical frequency
  D. optimum working frequency
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yuencyuenc
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6 years ago
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lindseyb1220 Author
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6 years ago
Thank you, thank you, thank you!
fxinternational
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Yesterday
Correct Slight Smile TY
Mkersey12
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2 hours ago
Thanks
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