యాంటెన్నా ఎత్తు పెరిగితే, రేడియేషన్ కోణం ______

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RRB ALP Mechanic Radio & TV 23 Jan 2019 Official Paper (Shift 3)
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  1. పెరుగుతుంది
  2. సున్నా అవుతుంది
  3. మారదు
  4. తగ్గుతుంది

Answer (Detailed Solution Below)

Option 4 : తగ్గుతుంది
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సరైన ఎంపిక 4

భావన:

రేడియేషన్ కోణం అనేది క్షితిజ సమాంతర యాంటెన్నా కోసం అత్యల్ప లోబ్ 'θ' యొక్క ఎలివేషన్ కోణం \(\theta = {\sin ^{ - 1}}\left( {\frac{{0.25}}{h}} \right)\) ద్వారా తరంగదైర్ఘ్యం 'h' పరంగా యాంటెన్నా యొక్క ఎత్తుకు సంబంధించినది.

అందువల్ల ఎత్తు పెరుగుదలతో, సైన్ ఇన్వర్స్ ఫంక్షన్‌లో విలువ తగ్గుతుంది కాబట్టి θ విలువ తగ్గుతుంది.

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