Experiment 8.1:
Problem statement: What is the relationship between the angle of incidence, i and angle of reflection, r?
Hypothesis: The angle of incidence, i is the same as the angle of reflection, r.
Aim: To determine the relationship between the angle of incidence, i and angle of reflection, r
Variables
Manipulated variable: Angle of incidence, i
Responding variable: Angle of reflection, r
Constant variable: The size of slit
Materials and Apparatus: Plane mirror, ray box, power supply, white paper, protractor.
Procedure
1. Carry out this activity in the dark.
2. Arrange a ray box and a plane mirror on a sheet of white paper.
3. Direct the light beam towards the plane mirror at an angle i = 10°.
4. Measure the angle of reflection, r.
5. Repeat steps 3 and 4 with angle of incidence, i = 20°, 30°, 40° and 50°.
6. Record your results in a table.
Results
Conclusion
Is the hypothesis accepted?
What is the relationship between the angle of incidence, i and angle of reflection, r?
Answer:
Angle of incidence, i, is equal to angle of reflection, r.
Problem statement: What is the relationship between the angle of incidence, i and angle of reflection, r?
Hypothesis: The angle of incidence, i is the same as the angle of reflection, r.
Aim: To determine the relationship between the angle of incidence, i and angle of reflection, r
Variables
Manipulated variable: Angle of incidence, i
Responding variable: Angle of reflection, r
Constant variable: The size of slit
Materials and Apparatus: Plane mirror, ray box, power supply, white paper, protractor.
Procedure
1. Carry out this activity in the dark.
2. Arrange a ray box and a plane mirror on a sheet of white paper.
3. Direct the light beam towards the plane mirror at an angle i = 10°.
4. Measure the angle of reflection, r.
5. Repeat steps 3 and 4 with angle of incidence, i = 20°, 30°, 40° and 50°.
6. Record your results in a table.
Results
Conclusion
Is the hypothesis accepted?
What is the relationship between the angle of incidence, i and angle of reflection, r?
Answer:
Angle of incidence, i, is equal to angle of reflection, r.