MCQOPTIONS
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| 1. |
The utilize of __________ gases allows the temperature at which a tungsten light operates to inc.. This gives a whiter distribution of light and inc. the efficiency of the light. __________ lights operate in the temperature range of 2800—3400 K.$ |
| A. | Metal |
| B. | Chalcogens |
| C. | Halogens |
| D. | Noble gases |
| Answer» D. Noble gases | |