Mr. Kostecki "Light and Mirrors Lab"

Light And Mirrors
Experimenters: Molly Lorenz, Eric Tuvell, and Leo Geggis
Purpose: To find through experimentation images, and to form them with mirrors.
Materials Used:
• Paper
• Eye charts (normal and reverse)
• Meterstick
• Mirror supports
• Pencil
• Protractor
• Ruler
• Small flat mirror
• T-pin
• Tape
• White Paper
Set Up Drawing:





Experimental Procedure: After the normal eye chart had been taped to the wall, I chose line 11 and stepped back to mark the reading line where I could still read it. The distance between the eye chart and the reading point was measured and recorded. Next, a flat mirror was secured to the wall at chest level and the back of the reverse eye chart was held to my chest, and I stepped back until is was barely visible. That spot was marked as the new spot and the distance between it and the mirror was measured. In the next section, after one flat mirror was standing up vertically, a piece of white paper was taped down onto the tabletop securely. Vertically, a pin was set in front of the mirror, on the white piece of paper. After getting down to eye level with the paper, an experimenter put their head to one side of the pin, closed one eye, and used a ruler to draw a line on the paper from the image of the pin to the opened eye. This line was labelled as the outgoing beam. Next, a line labelled as the incoming beam was drawn from the object to the mirror, connecting it with the outgoing beam. Then, a third line was drawn from the eye to the mirror at a 90º angle to the mirror. Then, the fourth line was drawn from the object to the mirror, parallel to the third line. The angle from the outgoing beam and the nearest perpendicular line was measured, along with the angle between the incoming beam and its nearest perpendicular line. From when an experimenter put their head to the side of the pin on was repeated twice more, a new experimenter each time and a new position.
Analysis:
A. Describe the image of the reverse eye chart you saw on the surface of the mirror. Compare it with the appearance of the normal eye chart.
-Compared to the normal eye chart, the reverse eye chart seemed smaller in the mirror.
B. What distance did you measure between the mirror and the reverse eye chart?
-I measured 1.545 m as the distance between the mirror and the reverse eye chart.
C. What distance did you measure between the starting point and the eye chart on the wall?
- I measured the distanced between the starting point and the normal eye chart as 2.545 m.
D. Compare your answers in B and C. What is the relationship between the distances?
-The normal eye chart’s measurement was 1 m larger then that of the reverse eye chart’s measurements.
E. Compare the two angles measure in step 13 for each position. What is the relationship between the angles?
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F. In your notebook, draw the experimental setup as viewed from above. Include the lines and angles for each trial.
KEY:
Blue= Outgoing beam #1
Orange= Outgoing beam #2
Green= Outgoing beam #3
Purple= Incoming beam # 1
Red= Incoming beam #2
Yellow= Incoming beam #3
Black= Perpendicular Lines


Conclusion:
In conclusion, this lab dealt primarily with the usage of images and flat mirrors. The chart was reflected in the mirror, and the pin was reflected in the mirror at angles.