Plane Mirrors and the Law of Reflection Dee Luo and Jasmine Raskas
Dec 18, 2015
Part 1Purpose: Determine the relationship between the angle of incidence and angle of reflection.
Hypothesis: The angle of incidence is the same as the angle of reflection.
Part 1 – Mathematical Analysis• θR Angle of Reflection • θi Angle of Incidence• θR θ∝ I
• θR = k θI
• k = 0.997 ( calculated by logger pro)• θR = (0.997) θI
Part 1 – Error AnalysisAccepted Value: 1Experimental Value: .997 • Absolute Error: |Acc Value-Exp Value| |1-.997| 0.003
• Relative Error: |Acc Value-Exp Value|/Acc Value * 100 |1-.997|/1* 100 0.3% Sources of Error:• The angle of the mirror was not perpendicular to the laser.• The markings on the given paper were not consistent.
Part 2 Purpose: Determine the relationship between the object distance and image distance.
Hypothesis: The object distance will be equal to the image distance.
Part 2 – Mathematical Analysis• DoObject Distance• Di Image Distance• Di Do∝• Di=k Do• K=0.999 (calculated by logger pro)• Di=(0.999) Do
Part 2 – Error AnalysisAccepted Value: 1Experimental Value: .999 • Absolute Error: |Acc Value-Exp Value| |1-.999| 0.001 • Relative Error: |Acc Value-Exp Value|/Acc Value * 100 |1-.999|/1 * 100 .01% Sources of Error:• The mirror was difficult to see through• It was hard to make the marking without moving the mirror• The mirror was not completely perpendicular to the page
Part 3 Purpose: Determine the relationship between the object height and image height.
Hypothesis: The object height will be equal to the image height.
Part 3 – Mathematical Analysis• HoObject Height• Hi Image Height• Hi Ho∝• Hi=k Ho• K=0.995• Hi=(0.995) Ho
Part 3 – Error AnalysisAccepted Value: 1Experimental Value: .995 • Absolute Error: |Acc Value-Exp Value| |1-.995| 0.005 • Relative Error: |Acc Value-Exp Value|/Acc Value * 100 |1-.995|/1 * 100 .05% Sources of Error:• The mirror was difficult to see through• It was hard to make the marking without moving the mirror• The mirror was not completely perpendicular to the page