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Solution


Q.

Match the corresponding entries of Column 1 with Column 2. [Where m is the magnification produced by the mirror]                [2016]

  Column 1   Column 2
(A) m = –2 (p) Convex mirror
(B) m=-12 (q) Concave mirror
(C) m = +2 (r) Real image
(D) m=+12 (s) Virtual image

 
1 A → p and s; B → q and r; C → q and s; D → q and r  
2 A → r and s; B → q and s; C → q and r; D → p and s  
3 A → q and r; B → q and r; C → q and s; D → p and s  
4 A → p and r; B → p and s; C → p and q; D → r and s  

Ans.

(3)

Magnification in the mirror, m=-vu

m=-2⇒v=2u

As v and u have same signs so the mirror is concave and the image formed is real.

m=-12⇒v=u2⇒Concave mirror and real image.

m=+2⇒v=-2u

As v and u have different signs but magnification is 2 so the mirror is concave and the image formed is virtual.

           m=+12⇒v=-u2

As v and u have different signs with magnification (12), so the mirror is convex and the image formed is virtual.