defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Physics Optics Refraction and Reflection
The focal length of a convex lens is f. It makes virtual image of size n times the size of the object. The distance of the object from the lens is :
1
\(\left(\dfrac{n-1}{n}\right)f\)
2
(n + 1) f
3
(n - 1) f
4
\(\left(\dfrac{n+1}{n}\right)f\)