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Unit 13 Quiz#3

Equations:

ni x sin(Thetai) = n r x sin(Thetar)

 

1. Medium 1 is more optically dense than medium 2. Construct the appropriate refracted ray in the diagram at the right in order to express your understanding about the direction light bends as it passes from one medium to another.


Useful Web Links

The Direction of Bending (20 seconds)

 

2. Medium 1 has a greater index of refraction than medium 2. Construct the appropriate refracted ray in the diagram at the right in order to express your understanding about the direction light bends as it passes from one medium to another.


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Optical Density and Index of Refraction (13 seconds)

The Direction of Bending (20 seconds)

 

3. Light is traveling through water (n=1.33) and is incident upon a glass (n=1.52) surface. The incident ray is shown in the diagram at the right.

a. Use the diagram to determine the angle of incidence and record in the space. ________

b. Calculate the angle of refraction. PSYW

 

c. Finally draw the refracted ray on the diagram at the appropriate angle.


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Angles of Incidence and Refraction (6 seconds)

Calculating the Angle of Refraction (10 seconds)

Tracing the Refracted Ray (15 seconds)

 

4. Using complete sentences, describe the only condition in which light will pass across a boundary from one medium to another medium without undergoing refraction.


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The Secret of the Archer Fish (8 seconds)

 

 

5. Light traveling through air (n = 1.00) is incident upon a triangular block (the triangle is equilateral; the sides make 60° angles with each other) made of an unknown material. The path of the light through the material is shown in the diagram below. Using a protractor and a calculator, determine the index of refraction of the unknown material. To receive credit, show the necessary measurements on the diagram and show all your work in the space below.


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Angles of Incidence and Refraction (6 seconds)

Determination of n Values (10 seconds)

 

6. Define the term critical angle.


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The Critical Angle (10 seconds)

 

7. Determine the critical angle for an air (n=1.00) - glass (n=1.60) boundary. PSYW


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The Critical Angle (10 seconds)

 

8. In which of the following situations will total internal reflection occur if the incident angle is gradually increased? Circle the answers (Yes or No).

TIR Occurs? Yes or No

TIR Occurs? Yes or No


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Total Internal Reflection (13 seconds)

 

 

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© Tom Henderson, 1996-1998


Glenbrook South High School.

Last updated on 10/13/98.