state gov RSMSSB Junior Assistant & Lipik Grade (LDC) Mock Test 2024 Physics Optics Refraction and Reflection
A plano convex lens (μ = 1.5) with radius of curvature 20 cm is silvered at the curved surface. The power of the system is :
1
15 D
2
10 D
3
5 D
4
2.5 D