Explain how defects in a metal block can be detected using ultrasound.

Explanation

Transmitter and receiver both works on echoranging Metalic components are generally used 14 construction of big structures , defects of metal plates (creaks and holes) are generally , infusible from outside are allowed to pass through the metal block and detectors are used detect the transmitted waves . If there is small defect, the ultrasound gets reflected back indicating the presence of feat or defect.