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PIRA Class: 6A10.50
Purpose:
To help students apply the "consequences" Law of Reflection to the everyday viewing of their own image.
Description:
A full view mirror is shaded/ covered from the bottom until a minimum height for a full view mirror is determined.
Before class: Make sure that the mirror (and its stand) is "perfectly" vertical.
In class:
- Have a volunteer student come up to the front, ask their height, and have class predict the size of mirror that they will need in order to see their full image.
- Move mirror up or down until student can see the top of their head. (Recheck mirror's vertical positioning)
- Cover up as much as possible of the mirror's bottom portion, without covering up their view of their feet. Compare the height of the remaining portion of the mirror with class's predictions.
- Optional: Ask students if the volunteer will still be able to see their feet if they moved toward (or away from) the mirror. NOTE: Have volunteer be careful with their close-up observations. They will have to look down into the mirror in order to see their feet.
Pedagogy: Have student hold up a brightly colored string to their eyes and direct your placement of the other end of the string at their image's head's position and then their image's feet position
Equipment:
Flat full view mirror
Support Equipment:
Location:
At the back of the room, to the left of 'Modern Physics' shelf
Simulation:
phet.colorado.edu/sims/html/geometric-optics/latest/geometric-optics_en.html
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