Physics · Illumination Engineering
फ्लड-लाइटिंग (floodlighting) में, संकीर्ण-बीम प्रोजेक्टरों (narrow-beam projectors) का उपयोग कितनी दूरी पर स्थित वस्तुओं को रोशन करने के लिए किया जाता है?
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