Question

The focal length of a concave mirror is 17cm. If an object is placed at a distance of 34cm from the
pole, then its image will be formed at---
​

Answer 1

Answer:

Given,

Type of Mirror = Concave

Focal Length (f) = -17 cm

Object Distance (u) = -34 cm

[These are negative values because of the conventional rule of concave mirror]

Let's take Image Distance as v cm.

According to the equation,

1/f = 1/u + 1/v

= -1/17 = -1/34 + 1/v

= -1/17 + 1/34 = 1/v

= (-2+1)/34 = 1/v

= -1/34 = 1/v

= -34 cm = v

So, it stands that Image is placed at 34 cm from the pole of concave mirror. It is a real image and is inverted in nature and is as same size as the object. It is formed at the centre of curvature of mirror.

I hope this helps.