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

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. -Where is the image located?

The figure is a scaled diagram of an object and a converging lens surrounded by air. Only one focal point, F, of the lens is shown. -At which of the labeled points will the image be formed?

A stamp collector used a magnifying glass with a focal length of 24.0 cm to observe his favorite stamp . The image of the stamp was located at his near point distance of 30.0 cm. What was the approximate angular magnification of the magnifying glass when the collector observed his stamp?

A fish swims 4.0 m below the surface of a still lake as shown in the figure. When an archer attempts to shoot the fish, the arrow enters the water at point P that is a horizontal distance 1.2 m from the fish. -If the archer is successful in shooting the fish, what angle does the arrow make with the horizontal as it enters the water?

Andrea's near point is 20.0 cm and her far point is 2.0 m. Her contact lenses are designed so that she can see objects that are infinitely far away. What is the closest distance that she can see an object clearly when she wears her contacts?

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.

A fish swims 4.0 m below the surface of a still lake as shown in the figure. When an archer attempts to shoot the fish, the arrow enters the water at point P that is a horizontal distance 1.2 m from the fish. -At which of the numbered positions should the archer aim to hit the fish?

A glass block with an index of refraction of 1.7 is immersed in an unknown liquid. A ray of light inside the block undergoes total internal reflection as shown in the figure. Which one of the following relations best indicates what may be concluded concerning the index of refraction of the liquid, n_L?

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?

The figure shows a point source of unpolarized light at A inside a uniform transparent crystal. The ray AO in the crystal strikes the plane surface SS' making an angle of 30° with the normal. This angle is the critical angle for transmission into air. -Determine the index of refraction of the crystal.

When an object is placed 20 cm from a diverging lens, a reduced image is formed. Which one of the following statements is necessarily true?

A grizzly bear is sitting on a rock in the middle of a calm river when she observes a fish directly below. If the apparent depth of the fish is 0.40 m, what is the actual depth at which the fish is swimming? The index of refraction of water is 1.33.

A fish swims 2.00 m below the surface of a pond. At what apparent depth does the fish appear to swim if viewed from directly above? The index of refraction of water is 1.33.

A converging lens is used to focus light from a small bulb onto a book. The lens has a focal length of 10.0 cm and is located 40.0 cm from the book. Determine the distance from the lens to the light bulb.

What is the Brewster angle when light is reflected from a plastic plate (n = 1.575) submerged in ethyl alcohol (n = 1.362)?

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 speed of this ray of light as it travels through the water?

Which one of the following statements best explains why chromatic aberration occurs in lenses, but not in mirrors?

A fish swims 4.0 m below the surface of a still lake as shown in the figure. When an archer attempts to shoot the fish, the arrow enters the water at point P that is a horizontal distance 1.2 m from the fish. -Which one of the following phrases most accurately describes the image of the fish as seen by the archer?

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

A beam of light passes from air into water. Which is necessarily true?