यदि किसी अवतल दर्पण पर आपतन कोण 30° हो, तो परावर्तन कोण का मान क्या होगा?

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RRB ALP CBT I 17 Aug 2018 Shift 2 Official Paper
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  1. 15°
  2. 30°
  3. 90°
  4. 60°

Answer (Detailed Solution Below)

Option 2 : 30°
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सही उत्तर 30 ° है

Key Points

  • परावर्तन: परिघटना जिसमें प्रकाश किरण को उसी माध्यम में सीमा के साथ अंत: क्रिया करने पर वापस भेज दिया जाता है जहां से वह आ रही है, परावर्तन कहलाती है।
  • परावर्तन के नियम: यह बताता है कि, यदि एक प्रकाश किरण को समतल सपाट पॉलिश सतह से परावर्तित किया जाता है तो आपतित कोण हमेशा परावर्तन के कोण के बराबर होगा
    • अर्थात, आपतन कोण (θi) = परावर्तन कोण (θr)
  • अतः​ परावर्तन के कोण का मान 30° होगा

 

 

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