Question

Kindly explain the question as soon as possible. The answer is supposedly 12 m, but I am not very sure. Please give appropriate explanation for your answer. Hoping for quick help! ​

Answer 1

Answer:

Given:

Doll (object) is present 4 metres from a plane mirror. The camera is located 6 metres away from the plane mirror

To find:

Distance for which the camera is focused so that camera takes the photo of the image of the doll.

Concept:

For a plane mirror, we know that object distance is equal to image distance.

So the virtual image of the doll is located 4 metres away from the mirror.

Now , we know that camera is located 6 metres from the mirror.

Hence the distance for which the camera has to be focused

= (distance of camera from mirror + image distance of doll from mirror )

= 6 + 4

= 10 metres.

So the final answer is 10 metres (option c)