Question

an object is placed at a distance of 20 centimetre from the convex mirror of the focal length 30 cm find the nature and the position of the image​

Answer 1

Answer:

An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. ...

v = 60/7 = 8.6 cm.

Image is virtual and erect and formed behind the mirror

Answer 2

Answer:

Nature of the image is virtual, erect and diminished & position of the image(v) = 12cm.

Explanation:

In case of the convex mirror,,

Given, object distance = u = -20cm ( in front of the mirror).

focal length = f = 30cm (behind the mirror).

By the mirror formula,,,

1/v+1/u = 1/f.

; 1/v +(-1/20) = 1/30.

; 1/v = 1/30+1/20.

Let's do the LCM of the fraction,,

; 1/v = 2+3/60.

; 1/v = 5/60.

; 1/v = 1/12.

Reciprocal the fraction,,

v = 12cm.