Match the corresponding entries of column 1 with column 2 [where m is the magnification produced by the mirror]
Column 1 |
Column 2 |
(A) m = -2 |
(a) Convex mirror |
(B) |
(b) Concave mirror |
(C) m = +2 |
(c) Real image |
(D) |
(d) Virtual image |
A b and c; B b and c; C b and d; D a and d
A a and c; B a and d; C a and b; D c and d
A a and d; B b and c; C b and d; D b and c
A c and d; B b and d; C b and c; D a and d
A->b and C
B->b and C
C-> b and d
D->a and d
Magnification in the mirror, m = -v/u
m=-2 ⇒ v = 2u As v and a have same signs so the mirror is concave and image formed is real.
m = -1/2 ⇒ v = u/2 ⇒ concave mirror and real lmage.
m= +2 ⇒ v = -2u
As v and u have different signs but magnification is 2 so the mirror is concave and image formed is virtual.
m =+1/2 ⇒ v = -u/2
As v and u have different signs with magnification (1/2) so the mirror is convex and image formed is virtual.