[مفاهيم]

س!/the spees of sound wave depends upon the


هذي الخيارات
frequency of the wave
amplitude of the waves
wavelength of the wave
proprties of the waves

س2_

an automtic focus camera is able to fous on objects bu 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
returns to the camera 0,115
seconds after leaving the camera,how far away is the object?



suppose a periodic wave through some medium. if the period pf the wave ic increased, what happens to the wavelength of the wave assuming the speed of the wave remains the same;


the wavelength increased
the wavelength decreases
the wavelength remanis the same


س3/

the efffect of temperature on velocity is neglible in clinical
ultrasonic

[الوردانى]

ج1 proprties of the waves