सूर्य विकिरण की तीव्रता 0.49 μm तरंगदैर्ध्य पर अधिकतम है। सूर्य को एक कृष्णिका मानते हुए, सूर्य की अनुमानित कुल उत्सर्जन शक्ति क्या है? [वीन के विस्थापन स्थिरांक = 2890 μm-K पर विचार करें]

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SJVN ET Mechanical 2019 Official Paper
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  1. 6.86W/m2
  2. 6.86kW/m2

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Option 1 :
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संकल्पना:

कृष्णिका के लिए स्टीफन-बोल्ट्जमान नियम का उपयोग करना:

तापमान ज्ञात करने के लिए, वीन के नियम को लागू करें:

अब गणना करें:

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