Question

The position of the image obtained by a convex lens when an object is kept between F1 & 2F1 (F: principal focus of the convex lens)​

Answer 1

Answer:

A same sized, real and inverted image is formed at centre of curvature, C2 when object is placed at centre of curvature, C1 of a convex lens. Properties of Image: Image is same size as object, real and inverted.

Answer 2

Answer:

Beyond $2F_{2}$.

Step-by-step explanation:

Given:- An object is kept between F1 & 2F1 where F is the principal focus of the convex lens.

To Find:- Position of the image obtained by the convex lens.

Solution:-

Here F is the principal focus of the the convex lens. So, $F_{1}$ is the focus on the object side and $2F_{1}$ is the center of curvature.

As the object is placed between Focus and Center of Curvature i.e. between $F_{1}$ and $2F_{1}$ - Let's consider 2 light rays from the object. One light ray passes un-deviated through the optical center of the lens whereas the other paraxial light ray passes through the second focus then these 2 rays meets to produce image beyond the center of curvature i.e. beyond $2F_{2}$.

The Image formed will be Inverted, Real and Magnified.

Hence the position of the image obtained is beyond $2F_{2}$.

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