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प्रश्न
Which electric bulb is required for the observation?
पर्याय
A clear glass electric bulb with a straight, thin filament
A clear glass electric bulb with a red colour filter
A clear glass electric bulb with a narrow, uniform slit
A clear glass electric bulb with a blue colour filter
MCQ
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उत्तर
The bulb must have a clear glass enclosure and a straight, thin filament. The filament is viewed through the slit.
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