Lab 10 – Refraction and Reflection

Name: __________________________________________________________Date:____________

Part 1: Ray Tracing

1. Screen shot of ray tracing of a converging lens:

• Screen shot of ray tracing a diverging lens:

Part 1 Analysis:

1. What does the converging lens do to all of the rays?

• What does a diverging lens do to all of the rays?

• If you are nearsighted, meaning that you have trouble seeing objects that are far away, your eye has trouble focusing the rays. In fact, the light focuses in the middle of the eye instead of the back of the eye as shown below. You can correct for this with glasses. What kind of lens would help this problem….converging lens or diverging lens? Explain.

Part 2 – Index of Refraction of a material

1. Data Table 1 – Measurements of the refracted angle due to the Incident angle of Water

Trials	Incident Angles	Refracted Angles	Calculated Index of Refraction
	20°	15°	1.32
	30°
	40°
	50°
	60°
		Average

• Data Table 2 – Measurements of the refracted angle Mystery A

Trials	Incident Angles	Refracted Angles	Calculated Index of Refraction
	20°
	30°
	40°
	50°
	60°
		Average

Part 2 Analysis:

1. The refractive index of water is 1.33. According to your average, does your measurement match the simulation?

• Based on your average and using the data table below, determine the substance for Mystery A.

Part 3 – Law of Reflection

Data Table 3 – Measurements of the reflected rays of water

Incident Angles	Reflected Angles
15°	16°
20°
30°
40°
50°
60°

Data Table 4 – Measurements of the reflective rays of glass

Incident Angles	Reflected Angles
15°
20°
30°
40°
50°
60°

Analysis

1. According to your data, does the law of reflection work better for one type of medium or does it apply to any medium?

• How well did the simulation simulate the law of reflection?