Question

An object 2 cm high produces a real image of 3 cm high when placed at a distance 15 cm . Calculate it’s position

Answer 1

Answer: 22.5 cm

Explanation:

Answer 2

The image is located at a distance of 22.5 cm from the mirror or lens.

Explanation:

It is given that,

Height of the object, h = 2 cm

Height of the image, h' = -3 cm (real image)

Object distance, u = -15 cm

We need to find the position of the image. It is given by the concept of magnification. It is given by :

$m=\dfrac{v}{u}=\dfrac{h'}{h}$

$\dfrac{v}{-15}=\dfrac{-3}{2}$

v = 22.5 cm

So, the image is located at a distance of 22.5 cm from the mirror or lens.

Learn more,

Magnification

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