image formed by concave mirror
Answers
image formed by concave mirror is real
Answer:
Formation of image depends upon the position of the object. There are six possibilities of the position of object in the case of concave mirror.
- Object at infinity
- Object between infinity and centre of curvature (C)
- Object at centre of curvature (C)
- Object between centre of curvature (C) and Principal focus (F)
- Object at Principal Focus (F)
- Object between Principal Focus (F) and Pole (P)
Object at infinity:
Since parallel rays coming from the object converge at principal focus, F of a concave mirror; after reflection. Hence, when the object is at infinity the image will form at F.
Object between infinity and Centre of Curvature:
When object is placed between infinity and centre of curvature of a concave mirror the image is formed between centre of curvature (C) and focus (F).
Object at Centre of Curvature (C):
When the object is placed at centre of curvature (C) of a concave mirror, a real and inverted image is formed at the same position.
Object between Centre of curvature (C) and Principal Focus (F):
When the object is placed between centre of curvature and principal focus of concave mirror, a real image is formed beyond the centre of curvature (C).
Object at Principal Focus (F):
When the object is placed at principal focus (F) of a concave mirror, a highly enlarged image is formed at infinity.
Object between Principal Focus (F) and Pole (P):
When the object is placed between principal focus and pole of a concave mirror, an enlarged, virtual and erect image is formed behind the mirror.
