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Which sensor can be used in robots for measuring distance?

Which sensor can be used in robots for measuring distance? Correct Answer Ultrasonic Sensor

Ultrasonic Sensor can be used in robots for measuring distance. This sensors use ultrasonic sound for measurement of distance. It constitutes of ultrasonic wave producer and a receiver. When the wave encounters an object, it bounces back to the receiver which further calculates the distance depending on the time it takes to cover that distance.

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