A small convex mirror and a large concave mirror are separated by 1.00 m, and an object is placed 1.4m to the left of the concave mirror .
The concave mirror forms an image of this object at distance cm. This image is then reflected in the convex mirror , which forms an image a distance of 8.00 cm behind the convex mirror. What is the focal lenght of the small convex mirror ?
