An object has a Magnification value of 2 and it is placed at a distance of 20 cm from a Convex Mirror. Calculate the image distan

Question

An object has a Magnification value of 2 and it is placed at a distance of 20 cm from a

Convex Mirror. Calculate the image distance and the focal length of the mirror​

in progress 0
Vivian 2 months 2021-08-12T06:36:21+00:00 1 Answer 0 views 0

Answers ( )

    0
    2021-08-12T06:37:42+00:00

    Answer:

    answr

    search

    What would you like to ask?

    12th

    Physics

    Ray Optics and Optical Instruments

    Problems on Mirror and Magnification Formula

    An object is placed at a di…

    PHYSICS

    avatar

    Asked on December 26, 2019 by

    Varshini Chhuttani

    An object is placed at a distance of 20 cm from a convex mirror or radius of curvature 40 cm. At what distance from the object should a plane mirror be placed so that the images due to the mirror and the plane mirror are in the same plane?

    MEDIUM

    Help best friend

    Study later

    ANSWER

    Given: An object is placed at a distance of 20 cm from a convex mirror or radius of curvature 40 cm.

    To find the distance at which the plane mirror should be placed such that the images due to the mirror and the plane mirror are in the same plane

    Solution:

    According to the given criteria,

    Object distance from convex mirror, u=−20cm

    Radius of curvature of convex mirror, R=40cm

    Focal length of the convex mirror, f=

    2

    R

    =

    2

    40

    =20cm

    Now applying the mirror formula we get,

    f

    1

    =

    v

    1

    +

    u

    1

    20

    1

    =

    v

    1

    +

    −20

    1

    v

    1

    =

    20

    1

    +

    20

    1

    ⟹v=10cm

    So the distance is formed on the opposite side of the object at a distance of 10 cm from the mirror as shown in above fig.

    The distance between object and image is u+v=20+10=30cm

    When plane mirror is placed in front of object and in order to get image at same position as convex mirror, the mirror should be place at

    2

    30

    =15cm, as in plane mirror the object distance from mirror is equal to image distance from the plane mirror (refer above fig).

    Hence the distance at which the plane mirror should be placed such that the images due to the mirror and the plane mirror are in the same plane = 15cm

Leave an answer

Browse
Browse

18:9+8+9*3-7:3-1*13 = ? ( )