A student draws a diagram to show the reflection of a light ray from a plane mirror.

Draw on this

Line B is the incident ray. What are the names of line A and angle C?

Line A: $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

Angle C: $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

The student does an experiment to investigate how light refracts when it enters a rectangular glass block from air.

The equipment available is:

• Ray box with one slit
• Rectangular glass block
• Pencil, ruler, and paper
• Protractor

Describe how the student does the experiment.

In your answer include:

• how the student sets up the equipment and marks the paths of the rays
• what measurements the student needs to take
• a prediction of what the student will find out from their results, comparing the angle of incidence and the angle of refraction.