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

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. -Which pair of terms most accurately describes the final image?

26-7 A 4.0-cm object is placed 30.0 cm from a converging lens that has a focal length of 10.0 cm as shown in the diagram. Note: The diagram is not drawn to scale. -Determine the height and orientation of 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 color(s) could, in principle, be seen by the observer?

A ray of light is normally incident on face ab of a plastic prism with an index of refraction n = 1.20 as shown. -Determine the largest value of the angle $\alpha$ so that the ray is totally reflected at the face ac if the prism is immersed in a liquid with refractive index 1.12.

In a slide projector, the slide is illuminated; and light passing through the slide then passes through a converging lens of focal length 0.10 m.If a screen is placed 5.0 m from the lens, a sharp image is observed.How far is the slide from the lens?

The figure shows the path of a ray of light as it travels through air and crosses a boundary into water.The index of refraction of water for this light is 1.33. -What is the angle of refraction for this situation?

A ray of light originating in oil (n = 1.21) is incident at the Brewster angle upon a flat surface of a quartz crystal (n = 1.458).Determine the angle of incidence for this ray.

Complete the following statement: Fiber optics make use of

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. -If the height of the object is 1.0 cm, what is the height of the image?

A 1.5-cm object is placed 0.50 m to the left of a diverging lens with a focal length of 0.20 m.A converging lens with a focal length of 0.17 m is located 0.08 m to the right of the diverging lens. -What is the location of the final image with respect to the object?

Joseph uses a converging lens (f = 0.12 m) to read a map located 0.080 m from the lens.What is the magnification of the lens?

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?

26-6 A diverging lens has a focal length of -15 cm.A 5-cm object is placed 35 cm from the lens. -Determine the approximate distance between the object and the image.

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?

26-14 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 one of the following figures shows the smallest angle of incidence in the water for which no light emerges into air? Note: Only one figure is physically possible.

Which one of the following expressions determines the critical angle for quartz (n = 1.5) immersed in oil (n = 1.1)?

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?

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.

In a scene from a movie, a nearsighted character removes his eyeglasses and uses them to focus the nearly parallel rays of the sun to start a fire.What is physically wrong with this scene?

A 1.5-cm object is placed 0.50 m to the left of a diverging lens with a focal length of 0.20 m.A converging lens with a focal length of 0.17 m is located 0.08 m to the right of the diverging lens. -What is the height and orientation with respect to the original object of the final image?