A coordinate axis as shown in the figure is placed in front of a converging lens at a distance of 2f from it
Answers
Image distance
Explanation:
Note: The question is incomplete. This is the full question for your reference: An object is placed at a distance of 2f from a concave mirror. Light reflected from the mirror falls on a plane mirror. The distance of the plane mirror from the concave mirror equals f. The distance of the final image from the concave mirror (due to reflection at both concave and plane mirror) is :
Please refer to the attached picture for the ray diagram.
For a concave mirror, object distance is 2f, then image is formed at 2f.
v1 = −2f for concave mirror
Image formed by concave mirror serves as an object to plane mirror.
Position of plane mirror with respect to concave mirror is d = −f
Position of object for plane mirror is u2 = −f (origin shifted to left)
Position of image for plane mirror is v2 = +f
Position of final image with respect to the concave mirror is v3 = v2 + d =0 (origin shifted to right).
