PRACTICE QUIZ 18A

Answer the following questions completely and clearly.

1. Where will a ray parallel to the principal axis go after it passes through a converging lens?

  

2. Where will a ray passing through the focal point go after it passes through a converging lens?

 

3. Draw and label a double convex lens and a double concave lens. Tell whether each is converging or diverging.

  

 

4. Describe the operation of a camera. Be sure to tell where the object and image are located (in terms of F and 2F) and the nature of the image (real/virtual, upright/inverted, larger/smaller).

  

 

 

5. Describe the operation of a film projector. Be sure to tell where the object and image are located (in terms of F and 2F) and the nature of the image (real/virtual, upright/inverted, larger/smaller).

  

 

 

6. Describe the operation of a magnifying glass. Be sure to tell where the object and image are located (in terms of F and 2F) and the nature of the image (real/virtual, upright/inverted, larger/smaller).

  

 

7. What happens to the image if the object is moved to a distance of exactly one focal length from the lens?

 

8. Draw a neat and complete ray diagram to locate the image of the object (arrow) in the following example.

 

 

9. What does a magnification value greater than 1.0 tell you about the image produced by a converging lens?

 

 

Solve the following. Show all work and circle your answer.

11. A converging lens has a focal length of 25.5 cm. If it is placed 72.5 cm from an object, at what distance from the lens will the image be? (answer = 39.3 cm)

 

  

 

12. If an object is 10.0 cm from a converging lens that has a focal length of 5.00 cm, how far from the lens will the image be? (answer = 10 cm)

 

 

  

 

13. The focal length of a lens in a simple camera is 10.0 cm. The distance between the lens and the film is 11.0 cm. If an object is clearly focused on the film, how far must the object be from the lens? (answer = 1.1 x 10² cm)

 

 

 

 

14. An object 3.0 cm tall is placed 22 cm in front of a converging lens. A real image is formed 11 cm from the lens. What is the size of the image? (answer = -1.5 cm)

 

 

 

 

15. An object 3.0 cm tall is placed 20 cm in front of a converging lens. Areal image is formed 10 cm from the lens. What is the focal length of the lens? (answer = 6.7 cm)