railway RRB Technician Grade 3 Mock Test 2024 General Science Physics Optics

100 cm फोकस दूरी वाले उत्तल लेंस की क्षमता क्या होगी?

1
1 डायोप्टर
2
0.1 डायोप्टर
3
10 डायोप्टर
4
100 डायोप्टर
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