PhysicsLAB: Thin Lens Equation #2: Converging Lenses

Worksheet
Thin Lens Equation #2: Converging Lenses

Directions: Work these problems on notebook paper, boxing in your answers. Although polished rays diagrams are not required, sketches for each situation are recommended. As you complete each problem, place your answers in the form and then submit them to verify your work. Make sure that your paper is signed and dated when the assignment is completed.

Refer to the following information for the next four questions.

A converging lens has a focal length of 40 cm.

If it is placed 50 cm from an object, at what distance from the lens will the image be formed?

Is the image real or virtual?

realvirtual

Is the image upright or inverted?

uprightinverted

What is the magnification?

Refer to the following information for the next four questions.

An object is placed 40 cm from a converging lens of focal length 20 cm.

How far from the lens will the image be formed?

Is the image real or virtual?

realvirtual

Is the image upright or inverted?

uprightinverted

Is the image enlarged, reduced, or the same size as the object?

enlargedreducedthe same size

Refer to the following information for the next five questions.

An object 3 cm tall is placed 40 cm from a lens. A virtual image is formed 60 cm from the lens.

What is the focal length of the lens?

Is the lens a converging or diverging lens?

convergingdiverging

Is the image upright or inverted?

uprightinverted

Is the image enlarged, reduced, or the same size?

How tall is the image?

Refer to the following information for the next six questions.

An object 2 cm tall is located 5 cm in front of a lens. An image is produced on the same side of the lens as the object 40 cm away from the lens.

What is the focal length of the lens?

Is the lens a converging or diverging lens?

convergingdiverging

Is the image real or virtual?

realvirtual

Is the image upright or inverted?

uprightinverted

Is the image enlarged, reduced, or the same size?

enlargedreducedthe same size

How tall is the image?

Refer to the following information for the next three questions.

A converging lens projects a real image of an object placed 10.0 meters in front of the lens onto a screen located 25.0 cm behind the lens.

What is the focal length of the lens?

What is the magnification?

If the object is 2 meters tall, how tall is the image?