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

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. -For what angle of incidence will the reflected rays of light be completely polarized?

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. -Approximately, what is the image distance?

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

A 2.00-cm tall object is placed 40.0 cm from a lens. The resulting image is 8.00-cm tall and upright relative to the object. Determine the focal length of the lens.

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.

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 air.

Which one of the following statements is true concerning a magnifying glass?

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 light ray is traveling in a diamond (n = 2.419). If the ray approaches the diamond-air interface, what is the minimum angle of incidence that will result in all of the light reflected back into the diamond? The index of refraction for air is 1.000.

The figure shows the path of a portion of a ray of light as it passes through three different materials. Note: The figure is drawn to scale. What can be concluded concerning the refractive indices of these three materials?

A camera with a focal length of 0.0500 m (a 50-mm lens) is focused for an object at infinity. To focus the camera on a subject which is 4.00 m away, how should the lens be moved?

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.

Light is incident at the Brewster angle on a plastic plate in air. The angle of refraction is 35.0°. -What is the index of refraction of the plastic plate?

An object with a height of 4.0 cm is placed 30.0 cm from a lens. The resulting inverted image has a height of 1.5 cm. What is the focal length of the lens?

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.

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?

A diverging lens has a focal length of -15 cm. A 5-cm object is placed 35 cm from the lens -Which pair of terms most accurately describes the image?

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?

Complete the following statement: Fiber optics make use of

A physics student desires to create a beam of light that consists of parallel rays. Which one of the following arrangements would allow her to accomplish this task?