Ray diagram of convex lens when object is placed at 2F1

When the object is placed at `2F_1` before the convex lens we will draw a ray diagram by following the rules for making a ray diagram.

Steps of drawing ray diagram of the convex lens

1. Draw the diagram of convex lens

2. Place the object in the given position

3. Draw a ray diagram by following rules

Draw the diagram of convex lens

First of all, we will have to draw the diagram of a convex lens with a principal axis (a horizontal line passing through the optical centre). Now mark `F_1` and `2F_1` on the left-hand side of the lens and `F_2` and `2F_2` on the right-hand side of the lens.

Place the object in the given position

Now we place the object (up-arrow)  at  `2F_1`

Draw a ray diagram by following rules

We draw two light rays coming from point A (object) with the help of rules for making a ray diagram.

The first light ray parallel to the principal axis incident on the convex lens and passes through `F_2` after refraction.

The second light ray passes through the optical centre (O) and goes straight without refraction.

Both the rays cross or meet at  `2F_2`

 

 

Position of image	At  `2F_2`
Nature of image	Real and inverted
Size of image	Same size

Related Topics 

Image formation by convex lens

1. Object is at Focus point (F1)

2. When an object beyond 2F1

3. Object  at infinity 

4. Object between F1 and O

5. Object between 2F1 and F1

6.  What is a refractive index