The graph below shows the results. Describe a method the student could have used to obtain the results shown in the graph above. – 6063

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1. I placed a glass block on a piece of paper and drew around it with a pencil.

   I used a ray box to shine a single ray of light through one side of the glass block.

   I marked the point where the ray entered the block and where it emerged on the other side.

   I removed the block and joined the points with a ruler to show the path of the ray through the block.

   I drew a normal line at the point where the ray entered the block (at 90° to the surface).

   Using a protractor, I measured the angle of incidence (the angle between the incident ray and the normal).

   I also measured the angle of refraction (the angle between the refracted ray and the normal).

   I repeated the experiment, changing the angle of incidence each time by 10°, from 10° up to 70°.

   I used the ray box for each new angle and measured the corresponding angle of refraction.

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