Question 369: Ray Optics

Question

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

(p)
Convex mirror

(B)
m = -$${1 \over 2}$$

(q)
Concave mirror

(C)
m = +2

(r)
Real image

(D)
m = +$${1 \over 2}$$

(s)
Virtual image

Accepted Answer

Magnification in the mirror, m = $$ - {v \over u}$$
m = Ã¢ÂÂ2 $$ \Rightarrow $$ v = 2u
As v and u have same signs so the mirror is concave and image formed is real.
$$m =  - {1 \over 2}$$ $$ \Rightarrow $$ v = $${u \over 2}$$
$$ \Rightarrow $$  Concave mirror and real image.
m = + 2 $$ \Rightarrow $$ v = Ã¢ÂÂ2u
As v and u have different signs but magnification is 2 so the mirror is concave and image formed is virtual.
$$m =  + {1 \over 2}$$ $$ \Rightarrow $$ v = $$ - {u \over 2}$$
As v and u have different signs with magnification $${1 \over 2}$$ so the mirror is convex and image formed is virtual.

Answer

A  $$ 	o $$  p   and   s;   B  $$ 	o $$  q  and  r;   C  $$ 	o $$  q  and  s;   D  $$ 	o $$  q  and  r

Answer

A  $$ 	o $$  r   and   s;   B  $$ 	o $$  q  and  s;   C  $$ 	o $$  q  and  r;   D  $$ 	o $$  p  and  s

Answer

A  $$ 	o $$  q  and  r;   B  $$ 	o $$  q  and  r;   C  $$ 	o $$  q  and  s;   D  $$ 	o $$  p  and  s

Answer

A  $$ 	o $$  p   and   r;   B  $$ 	o $$  p  and  s;   C  $$ 	o $$  p  and  q;   D  $$ 	o $$  r  and  s

Ray Optics

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 (p) Convex mirror (B) m = -${1 \over 2} (q) Concave mirror (C) m = +2 (r) Real image (D) m = +{1 \over 2}$ (s) Virtual image

Choose the correct answer: