The magnification of a mirror is $+1$. What does it mean?

Where should the light source (bulb) be placed in the reflector of a searchlight or torch so that the light rays travel over a long distance?

An object is placed at a distance of $18 \ cm$ in front of a concave mirror of focal length $12 \ cm$. Where will the image be formed?

$(i)$ Define a real image of an object.
$(ii)$ Name the mirror that:
$(a)$ can give a real as well as a virtual image of an object.
$(b)$ will always give a virtual image of the same size as the object.
$(c)$ will always give a virtual and diminished image of an object.
$(d)$ is used by a doctor in examining teeth.
$(iii)$ With the help of a ray diagram,explain the use of a concave mirror as a solar concentrator.

Copy the figure and show the image formation with the help of rays.

Where in front of the concave mirror should an object be placed to get its virtual and erect image?