Lens Lab from the Internet

Part One: Quantitative Observations

  1. Move the lens from the far right toward the focus point.
    Write down the what happens to the image as position is changed under these headings:

    - - - Size - - - - - Position - - - - Attitude - - - - - Type - - -

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  2. What happens to the image when the object is at F?

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  3. With the object at F, describe the image formed as the lens is moved closer to the object under the same headings as above.

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Part Two A: Quantitative Observations

From the Shock Wave media file

  1. Structure or set the diagram to these measurements:
    1. set focal length to 8.0 cm
    2. set object height to 4.0 cm
    3. set lens at 30.0 cm from the object
  2. Measure the height of the image and its position from the lens when the distance is set at these dimensions
    Distance 30.0 cm, 20.0 cm, 15.0 cm, 11.0 cm, 8.0 cm & 5.0 cm.
    Fill in this observation chart

Distance Height of Image Position of Image
from lens		 Type of Image
















































Part Two B

  1. Set the object at 4.0 cm. This would be do

  2. Object height can remain at 4.0 cm
  3. Starting with a focal length of 2.0 cm explain what happens to the image as the focal length is increased from 2.0 cm to approximately 7.5 cm.

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Part Two C

  1. Set the focal length to 5.0 cm

  2. Make measurements of the image distance when the object distance from the lens has these values; 5.0 cm, 10.0 cm, 15.0 cm and record in this table.

    f in cm 5 5 5
    d in cm 5 10 15
    i in cm


  3. There is a mathematical relationship that related these numbers. Can you figure it out. State this relationship.