Answer:
Concave Mirror
Explanation:
1).Concave Mirror
here the reflecting surface is curved inside then it is always concave mirror
2). Convex mirror
here the curved surface outwards will be the reflecting surface and focus is taken as negative as it always forms virtual image of smaller size.
3). Plane Mirror
here the reflecting surface is always plane surface and straight surface and its focus is infinite and always forms virtual image of same size
