1.6 Using Lenses

Question 1

What is the principal axis?

Answer 1

The x axis (label it in the diagram)

Question 2

How to draw a converging lens Ray diagram:

Answer 2

1. Locate 2F and F on each side of the lens on the principal axis
2. Draw the object where it tells you to
3. Draw a Ray parallel to the lens from the object and, when it reaches the lens, draw the Ray diagonally down through point F
4. Draw a Ray straight through the origin and meet the point from the first Ray
5. Where the 2 rays cross is the where the image lies so draw a line from the principal axis to the point and label it image
6. Draw arrows on the Rays in the direction they are going!!

Question 3

How to draw a diverging lens Ray diagram:

Answer 3

1. 1. Locate 2F and F on each side of the lens on the principal axis
2. Draw the object where it tells you to
3. Draw a Ray parallel to the lens from the object
4. Draw a Ray from the object straight through the origin
5. Draw a Ray from the F on the left of the lens and up to the top of the lens in dotted lines
6. The point where the 2 rays cross is where the virtual image lies
7. Draw arrows on the Rays in the direction they are going

Question 4

What is a Ray diagram?

Answer 4

A diagram drawn to find the image that different lenses produce with objects in different positions

Question 5

What are construction rays?

Answer 5

Rays drawn on a diagram to determine the nature and position of an image

Question 6

How does a camera form an image?

Answer 6

A camera uses a converging lens to form a real image of an object on a film or ccd

Question 7

What is a magnifying glass?

Answer 7

A converging lens that is used to form a virtual image of an object