Image Formation with Concave Mirror
Focal Length =
-7
cm
Object Distance =
-18
cm
Object Height =
3
cm
Formula:
1
/
f
=
1
/
v
+
1
/
u
or v
=
u f
/
(u-f)
Magnification:
m =
-
v
/
u
=
h
i
/
h
o
1
/
-7
=
1
/
-11.45
+
1
/
-18
& m = -
-11.45
/
-18
=
-0.64
Focal length, (f) =
-7
cm
Magnification, (m) =
-0.64
Object Distance, (u) =
-18
cm
Object Height, (h
o
) =
3
cm
Image Distance, (v) =
-11.45
cm
Image Height, h
i
=
-1.91
cm
FORMULA
Object
Image at infinity
Real Image
Virtual Image
Optical Axis
F
Concave Mirror