Case1:-Image formed by a concave mirror when the object is placed between pole and focus of the mirror when the object is placed between pole and focus of the mirror(object P and F)
the image formed is
1:-behind the mirror
2:-Virtual and erect
3:-Larger than the object(or magnified)
example:-
1:-A concave mirror being used as make-up mirror.It is magnifying a part of the face.
2:-Dentist's mirror is small concave mirror.It is magnifying with a long handle.It gives a magnified image of tooth
3:-A concave mirror can be used to magnified object.Here It is magnifying a matchstick kept close to it.
Case2:-when the object is placed at the focus of a concave mirror(object at F)
When an object is placed at the focus of a concave mirror ,the image formed is
1:-At infinity
2:-Real and inverted
3:-Highly magnified(or highly enlarged)
Example:-
When lighted bulb is placed at the focus of a concave mirror reflector,the diverging light ray of the bulb are collected by the concave reflector and then reflected to produce a strong parallel-side beam of light
Case3:- when the object is placed between focus and centre of curvature (object between F and C)
The image formed is
1:-Beyond the centre of curvature
2:-Real and inverted
3:-larger than the object(for magnified)
Note:-A real image is always inverted and virtual image is always erect
case4:- when the object is placed at the centre of curvature of a concave mirror(object at c)
Image formed at
1:-At the centre of curvature C
2:-Real and inverted
3:-same size as the object
Case5:-When the object is beyond the centre of curvature of the concave mirror(object beyond C)
The image formed is
1:-Between the focus and entre of curvature
2:-Real and inverted
3:-Smaller than the object(or diminished)
case6:-When object is at ∞
The image formed is
1:-At the focus F
2:-Real and inverted
3:-Much smaller than object(or highly diminished)
Note:-1:-When the object is at focus of concave mirror the image is formed at ∞
2:-When the object is at ∞ the image is formed at the focus of concave mirror.
Uses of concave mirrors:-
1:-Concave mirrors are used as shaving mirror to see a large image of face(it is a make up mirrors)
2:-concave mirror are used as reflectors in torches vehicle head lights and search light to get powerful beam of light.Concave reflector are also used in room heater.
3:-Large concave mirrors are used in the field of solar energy to focus sun's ray for heating solar furnace.
4:-concave dishes are used in TV dish antenna to receive TV signals from the distant communication satellites.