Plane Mirror Images - DOC - DOC by rqy18723

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									                                           Plane Mirror Images
Pre-Lab: Each group must complete and hand in their Pre-Lab Predictions before
         obtaining materials for this investigation.

Learning Tasks:

1. Use the available resources (large plane mirror, text, computer simulation, peer counsel)
   to determine a plane mirror’s a) minimum length and b) vertical placement on a wall
   necessary for one to see a full length image when standing in front of the plane mirror.

2. Determine if/how this necessary mirror size and placement depends on an
   individual person’s height and distance away from the mirror.

3. Include a complete explanation of your solutions using the behavior of
   light to justify your answers. This explanation should include diagrams.

4. Hand in your group’s report and the Self-Evaluation Rubric.




                                                                 Resources:

                                                                 large plane mirrors, text, peer counsel, meter sticks,
                                                                 computer simulation at
                                                                 http://www.phy.ntnu.edu.tw/java/optics/mirror_e.html




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                                                Lab Report Self-Evaluation Rubric

                                           Report Objectives
                                                                                                            disagree   unsure   agree
                          “The report contains acceptable statements describing …”
… the minimum length of a plane mirror that is needed for a person to see one’s full length image
… the mirror’s precise placement on the wall in order to see a full length image
… how the mirror’s size and placement depends on the height of the viewer
… how the mirror’s size and placement depends on how far the viewer is from the mirror

                                           Report Objectives
                                                                                                            disagree   unsure   agree
                            “The report contains acceptable explanations for …”
… why the stated minimum mirror size is valid
… why the stated mirror placement is valid
… why the stated relationship about mirror size, placement, and viewer’s height is valid
… why the stated relationship about mirror size, placement, and viewer’s distance from mirror is valid

                                            Report Objectives
                   “The report contains correctly drawn and properly labeled ray diagrams                   disagree   unsure   agree
                              that aid in the description and explanation of…”
… why the stated minimum mirror size is valid
… why the stated mirror placement is valid
… why the stated relationship about mirror size, placement, and viewer’s height is valid
… why the stated relationship about mirror size, placement, and viewer’s distance from mirror is valid

                                             Lab Objectives                                                 disagree   unsure   agree
                                   “Everyone in our lab group can now…”
… give the minimum length of a plane mirror and its precise placement on the wall for a person of a given
  height to see a full length image when standing a designated distance in front of the mirror
… justify why their response to the above is valid




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                          Plane Mirror Images: Pre-Lab Predictions

A student who is 5 feet tall stands 5 feet in front of a vertically positioned plane mirror that is the smallest it can
be in order for her to see her complete full-body reflection.

  Describe the size of this mirror and its vertical placement on the wall.




  If she moves farther away from the mirror, this minimum size will be (choose one: larger, smaller, or the same
   size) and it must be placed (choose one: higher, lower, or the same spot) on the wall.



Complete these statements:

The minimum size of a plane mirror needed to see one’s full-length image depends on ….




It’s placement on the wall depends on …




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