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कोई कृष्णिका 5760 K ताप पर है। इस पिण्ड द्वारा उत्सर्जित विकिरणों की ऊर्जा, तरंगदैर्घ्य 250 nm पर U1 ,तरंगदैर्ध्य 500 nm पर U2 तथा तरंगदैर्घ्य 1000 nm पर U3 है। वीन- नियतांक, b = 2.88 x 106 nmk है। नीचे दिया गया कौनसा सम्बन्ध सही है:

(a) U3 = 0

(b) U1 = 0

(c) U > U2

(d) U2 > U1

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