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| 1. |
Welders wear special goggles or face masks with glass windows to potect their eyes from electromagnetec radiations. Name the radiations and write the range of their frequency. |
| Answer» SOLUTION :Welders wear special goggles with glass WINDOWS to protect the eyes from ULTRA violet rays (UV rays). The range of UV rays is `4 xx 10^(-7)` m (400 nm) to `6 xx 10^(-10)` m (0.6 nm). | |