Question

A point object is placed at a distance of 20 cm from a convex mirror of focal length 20 cm. The image will form at:

Answer 1

Answer:

Explanation:

Solution,

Here, we have

Object distance, u = 20 cm

Focal length, f = 20 cm

To Find,

Image distance, v = ?

According to the Mirror formula,

We know that,

1/f = 1/v + 1/u

So, putting all the values, we get

⇒ 1/f = 1/v + 1/u

⇒ 1/v = 1/f - 1/u

⇒ 1/v = 1/20 - 1/20

⇒ 1/v = 1 + 1/20

⇒ 1/v = 2/20

⇒ 1/v = 1/10

⇒ v = 10 cm

Hence, the image distance will be 10 cm.