UPSC Prelims PYQ 1999: Why is Cobalt-60 used in radiation therapy?
Cobalt-60 is commonly used in radiation therapy because it emits:
- Alpha rays
- Betarays
- Gamma rays
- X-rays
Explanation
Option (c) is correct
- Cobalt-60 is widely used in radiation therapy because it emits powerful gamma rays, which can destroy cancer cells and treat tumours.
Answer: (c) Gamma rays
