Prelab

Textbook reference: see section on thin lenses

Consider this.
You write your name in half inch high letters on a card and place the card as the object at a distance from a lens, in millimeters, equal to the first 3 digits of your student number. You then find an image on the other side of the lens at a distance, in millimeters, equal to 10 plus the last 3 digits of you student number. For example. 953001553 would have the card object at 953mm and the image at 563mm.
Answer the following:

• State your student number
• Draw a sketch showing the lens, your name card, the image and object distances.
• On the sketch show the three principle light rays for imaging a point on your name.
• Calculate the focal length of the lens. (be sure to show your work)
• Determine the magnification of your image. Then determine how large, in inches, the letters in the image are.
• What does the minus sign in the magnification say about the image of your name?