## Reflection Lab (Day 1)

If you missed today in 2012-2013 or 2013-2014 (note big picture at the bottom of the page!)

We had students pick a new partner for this two day lab on reflection.

We had one group of two students volunteer to show all the other groups how to do part 1 (using two light paths through the same point [labeled object] reflected off a 1st surface mirror [the only correct reflecting side can be found by putting your pencil tip against it and if the image of the pencil tip touches the object tip you have the correct side] , then tracing these reflected rays back to where they intersect at the image.

Then another group demonstrated part 2 by drawing a scalene triangle ABC with no side parallel to the mirror or against the mirror (draw the triangle back 5 cm or more) then using the two way mirror (I call it the cheating mirror) locate the images A'B'C', remove the 2 way mirror, and draw triangle A'B'C' measuring the sides of both triangles and joining A to A'; B to B'; and C to C' measuring all three distance of objects A,B, and C from the mirror and all three image distances A',B', and C' from mirror (12 measurements total on diagram) then noting if you go alphabetically A,B,C around the original triangle if it is clockwise or counterclockwise and it you do the same with A'B'C' if it is clockwise or counterclockwise.

Part 3 tomorrow

Lab due next Wednesday.

Part 3 tomorrow

Lab due next Wednesday.