Physics · Dual Nature of Radiation and Matter
देहली आवृत्ति (threshold frequency) से 1.5 गुना आवृत्ति का प्रकाश एक प्रकाश-संवेदी पदार्थ पर आपतित होता है। यदि आवृत्ति आधी कर दी जाए और तीव्रता दोगुनी कर दी जाए, तो प्रकाश-विद्युत धारा क्या होगी?
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