What is a virtual image? (convex mirror) and how does a convex mirror work?

When light rays after reflecting from the mirror gets diverge and do not intersect at a point in the space then it will assumed that the light ray will intersect at imaginary point behind the mirror.

That imaginary point from which light appears to originate after reflection from the mirror is known as virtual image.

In case of convex mirror for all positions of object the image will be virtual image.

As we know by mirror formula

now here we will have

now we know that focal length of convex mirror is always positive as well as object position is always negative so here image will always form behind the mirror as per above formula.

So this will be virtual image always due to convex mirror

Wire rope guardrails are supposed to be capable of withstanding a force of 200 pounds without failure, it must not deflect under pressure to less than 39 inches above the walking surface, and it must be at least a quarter inch in thickness to prevent cuts when installing around buildings. To install the metal guardrail safely, you must use a sufficient amount of clips on the wire to ensure that it will not snap under the pressure and to ensure that it is safe to walk on or use as a support.