Question 197: Ray Optics

Question

A point like object is placed at a distance of 1 m in front of a convex lens of focal length 0.5 m. A
plane mirror is placed at a distance of 2 m behind the lens. The position and nature of the final
image formed by the system is :

Accepted Answer

Object is at 2f. So image will also be at 2f. (I
1
).
Image(I
2
) of I
1
will be 1 m behind mirror.
Now I
2
will be object for lens.
$$ 	herefore $$ u = -3 m
f = + 0.5 m
$${1 \over v} = {1 \over f} + {1 \over u}$$
= $${1 \over {0.5}} + {1 \over { - 3}}$$
$$ \Rightarrow $$ v = $${3 \over 5}$$ = 0.6 m
So total distance from mirror = 2 + 0.6 = 2.6 m and real image.

Answer

2.6 m from the mirror, real

Answer

1 m from the mirror, real

Answer

2.6 m from the mirror, virtual

Answer

1 m from the mirror, virtual

Ray Optics

A point like object is placed at a distance of 1 m in front of a convex lens of focal length 0.5 m. A plane mirror is placed at a distance of 2 m behind the lens. The position and nature of the final image formed by the system is :

Choose the correct answer: