Cracks in bones can be detected using ………

Explanation

Metallic components are used in the construction of big structures like buildings, bridges, machines, scientific equipments, etc. The cracks or holes inside the metal blocks, reduce the strength of the structure. Such defects are not visible from outside. Ultrasonic waves are used to detect such defects.

Ultrasonic waves are passed through the metal block and detectors are used to detect transmitted waves. If there is even a small defect, the ultrasound gets reflected and does not reach the detector. This indicates the presence of a defect or flaw.