Question

An object is placed 20cm. distance from the optical center of a convex lens. the focal length of the lens is 30cm. then caluculate the object distance and mention the characteristics of the image formed ?
please help somebody ​

Answer 1

Hello

I think you got the question wrong as the object distance is given, we should find image distance

Given:
Object distance(u) = 20
Focal length(f) = 30

Formula:
1/f = 1/v - 1/u

Solution:
1/f = 1/v - 1/u

1/v = 1/f +1/u
1/v =1/30 + 1/20
1/v = 2+3/60
1/v = 5/60
V = 60/5
V = 12 cm

Conclusion:
The image distance is 12 cm.
The image is Real and inverted.

That’s it mate
Thank you
Hope it helps!

Please mark it as brainliest

Answer 2

given object distance=-20cm

focal length of a convex lens=30cm

1/f=1/v-1/u

1/v=1/f+1/u

1/v=1/30+1/-20

1/v=1/30-1/20

1/v=2/60-3/60

1/v=2-3/60

1/v=-1/60

v=-60 cm

as the object is placed between the focus "f1" and optic center "o" the image formed  will be enlarged, virtual, erect and the image will be formed on the lens as the object.....

Hope you Understand.   :)   :)