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in Physics by (25.0k points)
किसी धातु से प्रकाशवैधुत प्रभाव प्राप्त करने के लिए दीर्घतम तरंगदैर्घ्य 200 नैनोमीटर है । 100 नैनोमीटर के विकिरण से प्राप्त प्रकाश - इलेक्ट्रॉनों की अधिकतम गतिज ऊर्जा होगी :
A. 12.4 eV
B. 6.2 eV
C. 100 eV
D. 200 eV

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