What type of mirror is used to obtain a real image?

Name the type of mirror used in the following situation and support your answer with a reason:
$(a)$ Solar furnace

Under what condition in an arrangement of two plane mirrors,will the incident ray and the final reflected ray always be parallel to each other,regardless of the angle of incidence? Show the same with the help of a diagram.

Explain why the word $AMBULANCE$ is written in reverse on the front of some vehicles.

What type of image is formed by a plane mirror?

If you want to see an enlarged image of your face, which type of mirror will you use? Where will you place your face?