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प्रश्न
Give reason for the following:
The photographic dark rooms are provided with infrared lamps.
Why does the photographic dark rooms are provided with infrared lamps?
कारण सांगा
अति संक्षिप्त उत्तर
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उत्तर
Infrared lamps are used in dark rooms for developing photographs since they do not affect the photographic film chemically, but they provide some visibility.
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