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

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?

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?

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.

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?

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?

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 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?

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?