Question 1

The figure shows a ray of light that originates in an aquarium. It travels through water, is incident on the glass side, and emerges into the air. Ignore any partial reflections. Note: The figure is not drawn to scale. 
-Which entry in the table below gives the correct values for the angles shown in the figure?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 2

A converging lens with a focal length of 12 cm produces a 3-cm high virtual image of a 1-cm high object. Which entry in the table below is correct?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 3

The speed of light in material A is 1.4 times as large as it is in material B. What is the ratio of the refractive indices, nA/nB, of these materials?

Accepted Answer

A) 1.4 
B) 1.2 
C) 1.0 
D) 0.80 
E) 0.71

Question 4

An object is placed 16 cm to the left of a converging lens with a 4.0-diopter refractive power. At what distance from the object will the image be located?

Accepted Answer

A) 14 cm 
B) 28 cm 
C) 44 cm 
D) 56 cm 
E) 64 cm

Question 5

An object is placed at the focal point of a converging lens of focal length f. What is the image distance?

Accepted Answer

A) f 
B) 2f 
C) 1/f 
D) 2/f 
E) at an infinite distance

Question 6

A fiber optic line is composed of a core with an index of refraction of 1.51 and cladding with an index of 1.40. Which one of the following relations best describes angles of incidence $\theta$ that will result in total internal reflection within the fiber optic line?

Accepted Answer

A) $\theta$ 68° 
C) $\theta$  22° 
E) 0 $\le$ $\theta$ $\le$90°

Question 7

Mrs. McKay has been prescribed eyeglasses with lenses that have a +3.2-diopter refractive power. The glasses are worn 2.0 cm from her eyes. With the lenses, she can read a magazine held 25 cm from her eyes. Which one of the following statements is necessarily true? Note: The near points and far points given in the following answers are measured relative to her eye.

Accepted Answer

A) She has a far point of 3.2 m. 
B) She has a far point of 0.25 m. 
C) She has a near point of 3.2 m 
D) She has a near point of 6.4 m. 
E) She has a near point of 0.87 m.

Question 8

A 4-cm object is placed in front of a converging lens of focal length 20 cm. The image is formed 60 cm on the other side of the lens. Which entry in the table below is correct?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 9

In her biology class, Chris examines an insect wing under a compound microscope that has an objective lens with a focal length of 0.70 cm, an eyepiece with a focal length of 3.0 cm, and a lens separation distance of 16.00 cm. Chris has a near point distance of 22.5 cm. What is the approximate angular magnification of the microscope as Chris views the insect wing?

Accepted Answer

A) -75 
B) -110 
C) -140 
D) -190 
E) -250

Question 10

The figure is a scaled diagram of a an object and a converging lens. The focal length of the lens is 5.0 units. An object is placed 3.0 units from the lens as shown. 
-Where is the final image located relative to the lens on the right?

Accepted Answer

A) 0.08 m to the left of the lens 
B) 0.12 m to the left of the lens 
C) 0.08 m to the right of the lens 
D) 0.12 m to the right of the lens 
E) 0.36 m to the right of the lens

Question 11

The length of the wing of an insect is 1 mm. When viewed through a microscope, the image is 1 m long and located 5 m away. Determine the angular magnification if the observer's near point of 25 cm.

Accepted Answer

A) 50 
B) 100 
C) 200 
D) 500 
E) 1000

Question 12

A ray of blue light travels through air and is refracted as it enters a glass prism shown in the figure. An unknown liquid is in contact with the right side of the prism. The light then follows the path shown. Which one of the following statements concerning this situation is true?

Accepted Answer

A) The frequency of the light changes inside the prism. 
B) The index of refraction of the glass is smaller than that of air. 
C) The index of refraction of the unknown liquid is the same as that of the glass. 
D) The speed of light is larger in the liquid than in the glass. 
E) The refractive index of the liquid is the same as that of air.

Question 13

A child sitting at the edge of a swimming pool sees a coin resting on the bottom of the pool. The coin appears to be 0.75 m directly below the water's surface. How deep is the pool at the location of the coin? The index of refraction of water is 1.33.

Accepted Answer

A) 0.75 m 
B) 0.86 m 
C) 1.0 m 
D) 1.2 m 
E) 1.6 m

Question 14

An object is placed 20.0 cm from a converging lens with focal length 15 cm. A concave mirror with focal length 10 cm is located 75 cm to the right of the lens as shown in the figure. Note: The figure is not drawn to scale. 
-Determine the location of the final image.

Accepted Answer

A) 48 cm to the right of the lens 
B) 96 cm to the right of the lens 
C) 30 cm to the left of the mirror 
D) 0.225 cm to the left of the mirror 
E) 0.225 cm to the right of the mirror

Question 15

The compound microscope discussed in Cutnell and Johnson's text is made from two lenses. Which one of the following statements is true concerning the operation of this microscope?

Accepted Answer

A) Both lenses form real images. 
B) Both lenses form virtual images. 
C) Only the lens closest to the eye forms an image. 
D) The lens closest to the object forms a real image; the other lens forms a virtual image. 
E) The lens closest to the object forms a virtual image; the other lens forms a real image.

Question 16

The figure is a scaled diagram of a an object and a converging lens. The focal length of the lens is 5.0 units. An object is placed 3.0 units from the lens as shown. 
-Which pair of terms most accurately describes the image?

Accepted Answer

A) real, upright 
B) real, enlarged 
C) real, inverted 
D) virtual, inverted 
E) virtual, upright

Question 17

A beam of light that consists of a mixture of red, green and violet light strikes a prism (surrounded by air) as shown. Indices of refraction for this prism for the various colors are indicated in the table. An observer is located to the right of the prism as shown.  
-Which physical phenomenon is illustrated by the fact that the emerging rays are spread into the component colors of the beam?

Accepted Answer

A) Doppler effect 
B) dispersion 
C) diffraction 
D) total internal reflection 
E) interference

Question 18

A child is looking at a reflection of the sun in a pool of water. When she puts on a pair of Polaroid sunglasses with a vertical transmission axis, she can no longer see the reflection. At what angle is she looking at the pool of water?

Accepted Answer

A) 45.0° 
B) 48.8° 
C) 53.1° 
D) 61.6° 
E) 77.3°

Question 19

The bending of light as it moves from one medium to another with differing indices of refraction is due to a change in what property of the light?

Accepted Answer

A) amplitude 
B) period 
C) frequency 
D) speed 
E) color

Question 20

Kaitlynne is using a magnifying glass (f = 0.098 m) while trying to solder a computer circuit board. The image is 0.21 m from the lens. What is the distance between the glass and the circuit board?

Accepted Answer

A) 0.052 m 
B) 0.062 m 
C) 0.067 m 
D) 0.093 m 
E) 0.16 m

Exam 26: The Refraction of Light: Lenses and Optical Instruments

A converging lens with a focal length of 12 cm produces a 3-cm high virtual image of a 1-cm high object. Which entry in the table below is correct?

The speed of light in material A is 1.4 times as large as it is in material B. What is the ratio of the refractive indices, n_A/n_B, of these materials?

An object is placed 16 cm to the left of a converging lens with a 4.0-diopter refractive power. At what distance from the object will the image be located?

An object is placed at the focal point of a converging lens of focal length f. What is the image distance?

A fiber optic line is composed of a core with an index of refraction of 1.51 and cladding with an index of 1.40. Which one of the following relations best describes angles of incidence $\theta$ that will result in total internal reflection within the fiber optic line?

A 4-cm object is placed in front of a converging lens of focal length 20 cm. The image is formed 60 cm on the other side of the lens. Which entry in the table below is correct?

The figure is a scaled diagram of a an object and a converging lens. The focal length of the lens is 5.0 units. An object is placed 3.0 units from the lens as shown. -Where is the final image located relative to the lens on the right?

The length of the wing of an insect is 1 mm. When viewed through a microscope, the image is 1 m long and located 5 m away. Determine the angular magnification if the observer's near point of 25 cm.

A child sitting at the edge of a swimming pool sees a coin resting on the bottom of the pool. The coin appears to be 0.75 m directly below the water's surface. How deep is the pool at the location of the coin? The index of refraction of water is 1.33.

An object is placed 20.0 cm from a converging lens with focal length 15 cm. A concave mirror with focal length 10 cm is located 75 cm to the right of the lens as shown in the figure. Note: The figure is not drawn to scale. -Determine the location of the final image.

The compound microscope discussed in Cutnell and Johnson's text is made from two lenses. Which one of the following statements is true concerning the operation of this microscope?

The figure is a scaled diagram of a an object and a converging lens. The focal length of the lens is 5.0 units. An object is placed 3.0 units from the lens as shown. -Which pair of terms most accurately describes the image?

A child is looking at a reflection of the sun in a pool of water. When she puts on a pair of Polaroid sunglasses with a vertical transmission axis, she can no longer see the reflection. At what angle is she looking at the pool of water?

The bending of light as it moves from one medium to another with differing indices of refraction is due to a change in what property of the light?

Kaitlynne is using a magnifying glass (f = 0.098 m) while trying to solder a computer circuit board. The image is 0.21 m from the lens. What is the distance between the glass and the circuit board?

Exam 26: The Refraction of Light: Lenses and Optical Instruments

A converging lens with a focal length of 12 cm produces a 3-cm high virtual image of a 1-cm high object. Which entry in the table below is correct?

The speed of light in material A is 1.4 times as large as it is in material B. What is the ratio of the refractive indices, nA/nB, of these materials?

An object is placed 16 cm to the left of a converging lens with a 4.0-diopter refractive power. At what distance from the object will the image be located?

An object is placed at the focal point of a converging lens of focal length f. What is the image distance?

A fiber optic line is composed of a core with an index of refraction of 1.51 and cladding with an index of 1.40. Which one of the following relations best describes angles of incidence θ\thetaθ that will result in total internal reflection within the fiber optic line?

A 4-cm object is placed in front of a converging lens of focal length 20 cm. The image is formed 60 cm on the other side of the lens. Which entry in the table below is correct?

The figure is a scaled diagram of a an object and a converging lens. The focal length of the lens is 5.0 units. An object is placed 3.0 units from the lens as shown. -Where is the final image located relative to the lens on the right?

The length of the wing of an insect is 1 mm. When viewed through a microscope, the image is 1 m long and located 5 m away. Determine the angular magnification if the observer's near point of 25 cm.

A ray of blue light travels through air and is refracted as it enters a glass prism shown in the figure. An unknown liquid is in contact with the right side of the prism. The light then follows the path shown. Which one of the following statements concerning this situation is true?

A child sitting at the edge of a swimming pool sees a coin resting on the bottom of the pool. The coin appears to be 0.75 m directly below the water's surface. How deep is the pool at the location of the coin? The index of refraction of water is 1.33.

An object is placed 20.0 cm from a converging lens with focal length 15 cm. A concave mirror with focal length 10 cm is located 75 cm to the right of the lens as shown in the figure. Note: The figure is not drawn to scale. -Determine the location of the final image.

The compound microscope discussed in Cutnell and Johnson's text is made from two lenses. Which one of the following statements is true concerning the operation of this microscope?

The figure is a scaled diagram of a an object and a converging lens. The focal length of the lens is 5.0 units. An object is placed 3.0 units from the lens as shown. -Which pair of terms most accurately describes the image?

A child is looking at a reflection of the sun in a pool of water. When she puts on a pair of Polaroid sunglasses with a vertical transmission axis, she can no longer see the reflection. At what angle is she looking at the pool of water?

The bending of light as it moves from one medium to another with differing indices of refraction is due to a change in what property of the light?

Kaitlynne is using a magnifying glass (f = 0.098 m) while trying to solder a computer circuit board. The image is 0.21 m from the lens. What is the distance between the glass and the circuit board?

The speed of light in material A is 1.4 times as large as it is in material B. What is the ratio of the refractive indices, n_A/n_B, of these materials?

A fiber optic line is composed of a core with an index of refraction of 1.51 and cladding with an index of 1.40. Which one of the following relations best describes angles of incidence $\theta$ that will result in total internal reflection within the fiber optic line?