Physics · Optics - Spherical Lenses
एक वस्तु को एक अवतल लेंस के सामने d दूरी पर रखा जाता है। वस्तु का एक सीधा प्रतिबिंब d/3 पर बनता है। यदि लेंस की फोकस दूरी 15 cm है, तो d किसके बराबर है?
- 120 cm
- 215 cm
- 330 cm✓
- 425 cm
सही उत्तर देखें
30 cm
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