Physics · Light Reflection and Refraction
एक अवतल लेंस की फोकस दूरी -2 सेमी है। इसकी क्षमता (power) क्या होगी?
- 10.5 D
- 2-0.5 D
- 3-50 D✓
- 425 D
सही उत्तर देखें
-50 D
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