Question

Which is correct ?

Answer 1

`4m`

Explanation:

From the given information we can say,magnification (`m`) of the image is `m=I/O=200/5` (where, `I` is the image length and `O` is the object length.)

Now,we also know that `m=-(v/u)` where `v` and `u` are distance between the lens and image and between lens and object respectively)

So, we can write,

`200/5=-(v/u)`

Given, `(-u)=10 cm`

So, `v=-10×(200/5)=400cm=4m`