Science Lab Report
Light Reflection and Refraction
Name: ________________________________________________________________________________
Date:
Grade:7 A, B, C
Aim:
To investigate how light reflects off surfaces and how it bends (refracts) when it passes
through different materials.
Materials:
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Plane mirror
Ruler
Protractor
White paper
Pencil
Glass block or rectangular prism
Flashlight or ray box
Water in a transparent container (optional)
Hypothesis:
Light will reflect off a mirror at the same angle as it arrives (angle of incidence = angle of
reflection), and it will bend when it passes from air into glass or water (refraction).
Procedure:
Part A – Reflection:
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Place a mirror on a sheet of white paper and trace around it.
Draw a normal line (a straight line at 90°) to the mirror surface.
Shine a light ray towards the mirror at an angle (the angle of incidence).
Mark the path of the incoming and reflected ray.
Use a protractor to measure both angles.
Science department – Lab. Report - T3 (24/25)
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Part B – Refraction:
6. Place the glass block on paper and trace around it.
7. Shine a light ray at an angle into the side of the glass block.
8. Trace the incoming ray and the refracted ray inside the block.
9. Trace the ray as it exits the block.
10. Repeat using water in a container if desired.
Observation:
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Results (Diagram):
(Draw the setup for both reflection and refraction. Label the incident ray, normal line,
reflected ray, and refracted ray.)
Science department – Lab. Report - T3 (24/25)
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Conclusion:
The experiment shows that:
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Questions:
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1. What is the angle of incidence and how is it measured?
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2. Why does light bend when it enters glass or water?
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Science department – Lab. Report - T3 (24/25)
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