Please solve numerical 12 am wet with
an y dir«-ted centre Of
Curvature Of a spherical mirror.
(b' through the '(Kus
pa»c.s through the m.Je
(d' parallel to the "irxipal axis.
retraces its path
image formed by a mirrcr :
erect and diminished
(b) erect enlarged
(c' inverted and diminished
(d' invertai am' enlarged,
Ans. (a) erect and diminished
A real and enlarged image can obtained by
(a) cmvex mirror (b' plane mirror
(c) c«xave mirror
(d) either convex or plane mirror.
Ans. (c) concave mirror
Numericais :
J. The radius of curvature of a convex mirror is
40 cm. Fimi its fckal length. Ans. 20 cm.
z. The fcxal length of a concave mirror is 10 cm.
Find its radius of curvature.
Ans. 20 cm.
3. An object of height 2 cm is placed at a distance
20 cm in front of a concave mirror of focal
10
12.
14.
166
An of length 4 Cm
(b) Wu will Length image
Am. 30 cm in
A ve mirror forms real image
pta-ed in from of it at a cm.
ti mes the si of object. Find a
of mim:r (b' mysition Of irnage_
Ans. (a) 22-5 cm. (b) 90 cm in
A concave mirror forms a virtual
twice that of the object pl"ed at a
from it, Find : (aj the length 01
(b) psiticm of image.
Ans. (a) 10 cm. (b) 10 cm
The image for-ard by a convex is
one-third the size of object. How are u
related ?
The erect image fomrd by a cotEav,e
size double the size of object. How are u
related ?
TIE magnificaticm f« a mirrrr is —3.
v related ?
