मानक स्रोत के संदर्भ में अज्ञात स्रोत द्वारा उत्पादित प्रकाश की तीव्रता को मापने के लिए किस उपकरण का उपयोग किया जाता है?
Which instrument is used to measure the intensity of light produced by an unknown source in terms of a standard source?
Anonymous Poll
57%
फोटोमीटर
20%
कैलीपर्स
14%
एम्मिटर
10%
डायनोमोमीटर
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