Physics, 19.01.2021 14:00 dchirunga23
1. An automatic focus camera is able to focus on objects by use of an ultrasonic sound
wave. The camera sends out sound waves that reflect off distant objects and return to
the camera. A sensor detects the time it takes for the waves to return and then
determines the distance an object is from the camera. If a sound wave (speed = 345
m/s) returns to the camera 0.115 seconds after leaving he camera, how far away is the
object?
Answers: 2
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1. An automatic focus camera is able to focus on objects by use of an ultrasonic sound
wave. The ca...
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