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in Physics by (24.9k points)
किसी धातु पृष्ठ से उत्सर्जित इलेक्ट्रॉन का अधिकतम वेग दोगुना हो जाता हैं जब आपतित प्रकाश की आवृत्ति v को दो गुना करते हैं । धातु का कार्यफलन हैं -
A. शून्य
B. `(hv)/(3)`,
C. `(2hv)/(3)`,
D. `(hv)/(2)`

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