Experiment 8.1 – Science Form 1 Chapter 8


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.

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