Question

An object placed at a distance of 15cm from convex lens if the focal length of lens is 60 cm find the image distance​

Answer 1

Answer:

-1/20

Explanation:

brother i got that answer by using the formula

1/v=1/f-1/u

Answer 2

Answer:

-20 cm is the answer

Explanation:

1/v = 1/f - 1/u

1/v = 1/60 - 1/15

    = 1/60 - 4/60         {Multiply 1/15 by 4}

    = -3/60

1/v = -1/20                   {Divide -3/60 by 3}

∴ v = -20 cm