In order to locate and describe an image created using a convex lens, first we need to draw the lens with the principal axis and focal points labeled. Then we need to draw the object (usually shown in the diagram as an arrow).

As you can see, this image is inverted and larger. But is it real or virtual?

To answer this question we look at where the light is. The light passes through the lens and winds up on the other side from the object. The image is on the other side of the lens from the object. That means that this image is formed by actual crossing light rays and is therefore a real image.

This image is virtual because the light rays don't actually cross there, you brain just thinks they do. It is upright and larger.

In the following simulation, you can click and drag the bottom of the object to move it closer to or farther from the lens. Data about the image is reported to you in the green area on the right.

Image Formation by Converging Lenses

Copy this table into your notes and fill in the missing information

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Check Your Answer

Object Position	Upright or Inverted	Larger or Smaller	Real of Virtual
Outside 2F	inverted	smaller	real
At 2F	inverted	same size	real
Between 2F and F	inverted	larger	real
At F	no image	no image	no image
Between F and lens	upright	larger	virtual