Question

Where in the industrial field is radioactivity used?

Answer 1

​Radioactivity has various industrial application:

• It is used as a fuel in nuclear reactors to generate power.
• Internal cracks and voids in cast iron articles can be detected with the help of gamma rays
• It is used in controlling the thickness of paper, plastic and metal sheets during their manufacturing.
• It is used in the manufacturing of luminescent paints and objects which show radioluminance. For example, substances such as radium, promethium etc. are used to make objects which glow in the dark like hands of clock. Similarly, krypton-85 is used in high intensity discharge lamps.
• Radioactive substances are used in ceramics, utensils, plates etc. to obtain luminous colours.