defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Physics Optics Refraction and Reflection
An object is placed at a distance of 50 cm from a spherical mirror and its image is formed 10 cm behind the mirror. What is the focal length of the mirror?
1
25.5
2
12.5 cm
3
6.25 cm
4
6.5 cm