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You want to create a device that sends signals to your dog to stop barking. which type of electromagnetic wave would be most useful to investigate?
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5 votes
You want to create a device that sends signals to your dog to stop barking. which type of electromagnetic wave would be most useful to investigate?

User Jason Irwin
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1 Answer

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The answer is radio waves. Th other waves can't send signals to a dog. Its just not how they travel.
User WeezHard
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