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Power point presentation

1. CONCAVE MIRROR

VILESH V. L.
PHYSICAL SCIENCE
Reg. No.: 13975035

2. CONCAVE MIRROR
A concave mirror is that spherical
mirror in which the reflection of light
takes place at the concave surface.

3. PARTS OF CONCAVE MIRROR
Centre of
curvature (C)
Radius of
curvature (R)
Pole (P)
Principal Axis
Principal Focus
(F)
P
_____R___
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4. RULES FOR OBTAINING IMAGES
FORMED BY A CONCAVE MIRROR
RULE -1
A ray of light which
is parallel to the
principal axis of a
concave mirror ,
passes trough its
focus after
reflection from the
mirror

5. RULE-2
A ray of light
passing trough
the centre of
curvature of a
concave mirror
is reflected
back along the
same path

6. RULE-3
A ray of light
passing trough
the focus of a
concave mirror
becomes
parallel to the
principal axis
after reflection

7. FORMATION OF DIFFERENT TYPES
OF IMAGES BY A CONCAVE MIRROR
Positions of the object :
between the pole (P) and focus (F)
At the focus (F)
between focus (F) and centre of
curvature (C)
At the centre of curvature (C)
beyond the centre of curvature (C)
At infinity

8. THE OBJECT IS PLACE BETWEEN POLE AND
FOCUS OF THE MIRROR
(OBJECT BETWEEN P AND F)
NATURE OF
IMAGE
behind the
mirror
Virtual and
erect
larger than the
object

9. WHEN THE OBJECT IS PLACED AT
FOCUS OF A CONCAVE MIRROR
(OBJECT AT F)
NATURE OF
IMAGE
at infinity
real and
inverted
highly
magnified or
enlarged

10. THE OBJECT IS PLACED BETWEEN FOCUS
AND CENTRE OF CURVATURE
(OBJECT BETWEEN F AND C)
NATURE OF
IMAGE
beyond the
centre of
curvature
real and
inverted
larger than the
object

11. THE OBJECT IS PLACED AT THE
CENTRE OF CURVATURE OF ACONCAVE
MIRROR (OBJECT AT C)
NATURE OF
IMAGE
at the centre
of curvature
real and
inverted
same size as
the object

12. THE OBJECT IS BEYOND THE CENTRE OF
CURVATURE OF A CONCAVE MIRROR
(OBJECT BEYOND C)
NATURE OF
IMAGE
between the
focus and
centre of
curvature
real and
inverted
smaller than
the object

13. WHEN THE OBJECT IS AT INFINITY
NATURE OF
IMAGE
at the focus
real and inverted
much smaller
than the object
(or highly
diminished)

14. USES OF CONCAVE MIRRORS
Concave mirrors are used
As reflectors in car
head-lights ,search
lights ,hand torches ,and
table lamps.
By doctors to
concentrate light on
body parts like ears and
eyes.
In the field of solar
energy to focus sun-
rays on the objects to
be heated.
As shaving mirrors.

15. THANK YOU