Question

Table 2

Angle of Incidence, θi (degrees)	Angle of Refraction, θr (degrees)	Sin of Angle of Incidence, Sin(θi)	Sin of Angle of Refraction, Sin(θr)
15	10.7
30	20.9
45	30.3
60	38.2
75	43.6

Data Table (20 Points)

1. Use Excel to graph the sin of the angle of incidence vs the sin of the angle of refraction. From the graph, determine the Index of Refraction of the material the rhombus is made from. Make sure to turn in this graph with your lab Worksheet. (20 points)

2. Describe the relationship between the angle of incidence and angle of refraction. (10 points)

Answer 1

Angle of Incidence,	Angle of Refraction,	Sin of Angle of Incidence, Sin(θi)	Sin of Angle of Refraction, Sin(θr)
15	10.7	0.2588	0.1857
30	20.9	0.5	0.3567
45	30.3	0.7071	0.5045
60	38.2	0.866	0.6184
75	43.6	0.9659	0.6896

Index of refraction = slope of the graph

Considering any two poiints on the Y axis and its corresponding value from the x axis

Slope = (0.7071- 0.2588)/ 0.5045 - 0.1857 = 0.4483/0.3188 = 1.41

For a given pair of medium and for a given color of light , The ratio of the angle of incidence to angle of refraction is a constant. ie. For a particular value of angle of incidence , thereb is only one corresponding angle of refraction