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Question
Where in the industrial field is radioactivity used?
Solution
- It is used as a fuel in nuclear reactors to generate power.
- It is used in controlling the thickness of paper, plastic, and metal sheets during their manufacturing.
- Luminescent paint and radioluminescence: 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 the hands of the clock. Similarly, krypton-85 is used in high-intensity discharge lamps.
- Use in Ceramic articles: Radioactive substances are used in ceramics, utensils, plates, etc. to obtain luminous colours.
- Radiography: Gamma rays from isotopes like cobalt-60, and iridium-192 are used in the radiography camera to detect the Internal cracks and voids in cast iron articles and iron solder. This technique is applied to detect flaws in metalwork.
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