a concave mirror has focal length 15 cm and object distance 40cm find its image distance​

Question

a concave mirror has focal length 15 cm and object distance 40cm find its image distance​

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Margaret 2 months 2021-07-27T13:57:33+00:00 1 Answers 0 views 0

Answers ( )

    0
    2021-07-27T13:59:02+00:00

    Answer:

    36 cm

    Explanation:

    Initially:

    u

    i

    =−40cm f

    i

    =−15cm

    v

    i

    1

    +

    u

    i

    1

    =

    f

    1

    v

    i

    1

    +

    −40

    1

    =

    −15

    1

    ⇒v

    i

    =−24cm

    Finally: u

    f

    =−20cm f=−15cm

    v

    f

    1

    +

    u

    f

    1

    =

    f

    1

    v

    f

    1

    +

    −20

    1

    =

    −15

    1

    ⇒v

    f

    =−60cm

    Thus image is shifted by 60−24=36cm

    (away from mirror)

    Option (4) is correct.

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