Question

1. Describe how to find the approximate focal length of a concave mirror using the distant object method. Why do we say it is an approximate method?​

Answer 1

Explanation:

3 method 1.3meter dista

Answer 2

Answer:

By obtaining the Real image of a distant object at its focus, the focal length of the concave mirror can be estimated as shown in the diagram. The focal length of the convex mirror is positive, whereas that of the concave mirror is negative. The same can also be proved by using the mirror formula: (1/f = 1/v +1/u).