A convex lens forms a real image of the ...

A convex lens forms a real image of the object when the lens is at a distance of 1 m from the object. The size of the image is 3 times that of the object. The position of the object and the screen are kept fixed but the distance of lens from the object is doubled. The image is now one half of the size of the object, the focal length of the lens is

A

1.6 m

B

0.80 m

C

0.40 m

D

0.20 m.

Verified by Experts

Similar Questions

Explore conceptually related problems

A convex lens produces a real image m times the size of the object. What is the distance of the object from the lens ?

A convex lens of focal length 16 cm forms a real image double the size of the object. The distance of the object from the lens is

A concave lens of focal length f produces an image (1//n) times the size of the object. The distance of the object from the lens is :

A convex lens of focal length 16 cm forms a virtual image of double the size of the object. What is the distance of the object from the lens ?

The distance between the object and real image formed by a lens is D . If the magnification is m , then the focal length of the lens is given by :

If in a convex lens object and its image distances are each equal to d, the focal length of the lens is