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Three of the following are used to detect lightning. Which is the odd one out?

  • A.electric field mills at the surface
  • B.a standard tipping bucket rain gauge
  • C.radio frequency time of arrival networks
  • D.satellite optical transient detectors

Answer: B

A rain gauge measures precipitation and has no electrical sensitivity. The other three are all established lightning detection techniques. Each senses a different signature of the discharge. A rain gauge senses none of them at all.

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