The focal length f of a thin lens is the distance from the lens to a focus behind it, if the lens is hit by a collimated beam (see Figure 1 (a)). For a defocusing lens, the focal length is negative: it is minus the distance to the virtual focus (see Figure 1 (b)). For a...
Homework Statement An object is in the focal length of a convex lens. As the object is moved from the focus towards the lens, what happens to the object? Homework Equations 1/f=1/d0+1/di The Attempt at a Solution I know how to solve this problem using ray diagrams, and the solution...
First, we need to find the focal length of the mirror. The focal length of a concave mirror is half its radius of curvature, so in this case, it would be 18 cm. Next, we can set up the equation using the given information that the image is five times the size of the object. Thi...