MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Image Formation by Concave Lens

An image 2 / ...

Question

An image 2/3 of size of the object is formed by a convex lens at a distance of 12cm from it. Find the focal length of the lens

Open in App

Solution

h' = 2/3 * h

h'/h = 2/3

m = 2/3

v = 12cm

m = -v/u = 2/3

-12/u = 2/3

u = -18cm

1/f = 1/u + 1/v

= 1/36

so , focal length (f) = 36 cm

Suggest Corrections

thumbs-up

2

Similar questions

An image 3/2 of size of object is formed by a convex lens at a distance of 12cm from it. Find focal length

Q. The size of the image of an object, which is at

\infty,

is formed by a convex lens of focal length

30 cm

2 cm .

If a concave lens of focal length

20 cm

is placed between the convex lens and the image at a distance of

26 cm

from the convex lens. Find the new size of the image-

Q. Image of an object at infinity is formed by a convex lens of focal length

30 c m

such that the size of the image is

2 c m

. If a concave lens of focal length

20 c m

is placed in between the convex lens and the image, at a distance

26 c m

from the convex lens, size of the new image is:

Q. The size of the image of an object, which is at infinity, as formed by a convex lens of focal length

30 c m

2 c m

. If a concave lens of focal length

20 c m

is placed between the convex lens and the image at a distance of

26 c m

from the convex lens, calculate the new size of the images.

Q. A convex lens of focal length F forms a real image, 3 times the size of object. The distance of object from the lens is

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Image formation by concave lens

PHYSICS

Watch in App

explore_more_icon

Explore more

Image Formation by Concave Lens

Standard X Physics

Join BYJU'S Learning Program

CrossIcon