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Explain how echoes are used by bats to judge the distance of an obstacle in front of them.

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  • Bats search out prey and fly in dark night by emitting and detecting reflections of ultrasonic waves. 
  • The high pitched ultrasonic squeaks of the bat are reflected from the obstacles or prey and returned to bat’s ear. 
  • The nature of reflections tells the bat where the obstacle or prey is and what it is like. 
  • The bats use ultrasound for navigation and location of the food in dark.

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