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What are echoes?
  • a)
    An impressionist repeating the noise
  • b)
    Reflections of sounds
  • c)
    Reflections of light
  • d)
    Refraction of sounds
Correct answer is option 'B'. Can you explain this answer?
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What are echoes?a) An impressionist repeating the noiseb) Reflections ...
Common examples used in the GCSE are sonar from ships and submarines to measure depth, bats using echo location to find their prey and echoes in the mountains
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