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प्रश्न
Answer briefly.
Give two uses of ultraviolet rays.
उत्तर
Uses:
- Ultraviolet rays destroy germs and bacteria and hence they are used for sterilizing surgical instruments and for purification of water.
- Used in burglar alarms and security systems.
- Used to distinguish real and fake gems.
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संबंधित प्रश्न
Identify the part of the electromagnetic spectrum which is:
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| Element | Ne | P | Ca | Mn | Zn | Br |
| Energy (keV) | 0.858 | 2.14 | 4.02 | 6.51 | 9.57 | 13.3 |
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Answer briefly.
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