Question

an object is placed at a distance of 2ffrom a concave mirror of focal length f the image distance is..​

Answer 1

Answer:

Zero.

Explanation:

For a concave mirror, when object is at 2f. image is formed at 2f.

Hence, 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

Hence, position of object for plane mirror is, u

2

=−f, (origin shifted to left)

Hence, position of image for plane mirror is, v2

=+f

Position of final image wrt the concave mirror is v3 =v2

+d=0, (origin shifted to right) Mark my answer as Brainliest❤.