Question

It can be argued that a flat mirror has an infinite focal length. If so, where does it form an image? That is, how are${\mathit{d}}_{\mathbf{i}}$and${\mathit{d}}_{\mathbf{0}}$related?

Short answer

Distance between viewer and object can be seen with the help of expression:$d_0+d_i$

Step-by-step solution

Define Geometric Optics

Geometrical optics, often known as ray optics, is an optics model that describes light propagation using rays. In geometric optics, a ray is an abstraction that can be used to approximate the routes along which light propagates under particular conditions.

Explanation

The values form an image in the sequence of:

$d_0+d_i$

The relation between the values $d_0$,$d_i$is that when both are combined, they give us a fixed value. So, that results in the distance between a viewer and an object.

Therefore, the distance between the object and the viewer is:$d_0+d_i$ .