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

Two converging lenses,each with a focal length of 0.080 m,are used in combination to form an image of an object that is located 0.24 m to the left of the left lens in the pair.The distance between the lenses is 0.16 m. -What is the total magnification of this lens combination?

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.

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

The moon is observed using a telescope that has an objective lens with a focal length of 3.0 m and an eyepiece with a focal length of 6.0 cm.What is the angular diameter of the moon if the earth-moon distance is 3.85 × 10⁸ m and the diameter of the moon is 3.48 × 10⁶ m?

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.

Without his contact lenses,Mr.Chong can focus from 0.80 m to infinity.What refractive power of the lenses does he require for normal reading (0.25 m from the eyes)?

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?

Which one of the following statements concerning the index of refraction for a given material is true?

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 table lists the index of refraction for various substances at 20 °C for light with a wavelength of 589 nm in a vacuum.Through which substance will light with a vacuum wavelength of 589 nm travel with the greatest speed?

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 so that the ray is totally reflected at the face ac if the prism is immersed in air.

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?

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?

A diverging lens has a focal length of -15 cm.A 5-cm object is placed 35 cm from the lens. -What is the magnification of the image?

Light with a wavelength of 589 nm in a vacuum strikes the surface of an unknown liquid at an angle of 31.2° with respect to the normal to the surface.If the light travels at a speed of 1.97 × 10⁸ m/s through the liquid,what is the angle of refraction?

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?

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?

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?

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?

Rachel has a far point of 5 m.Which statement below concerning Rachel's vision is true?