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. -If point A is 16 cm below the plane SS', what is the radius of the largest circle at the air-crystal interface through which light can emerge from the crystal?

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?

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?

An object is placed 6.5 cm from a thin converging lens with a focal length of 14 cm.Which one of the following statements is true concerning the image?

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 entry in the table below gives the correct values for the angles shown in the figure?

26-13 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?

26-9 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. -Where is the final image located relative to the lens on the right?

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.

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

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?

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?

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

26-2 Light is incident at the Brewster angle on a plastic plate in air.The angle of refraction is 35.0°. -Determine the Brewster angle.

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 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.

26-6 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?

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. -A second converging lens is placed 20.0 cm to the right of the lens shown in the figure.Determine the focal length of the second lens if an inverted image (relative to the object in the diagram) is formed 13.3 cm to the right of the first 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 air.

Blue light with a wavelength of 425 nm passes from a vacuum into a glass lens; and the index of refraction is found to be 1.65.The glass lens is replaced with a plastic lens.The index of refraction for the plastic lens is 1.54.In which one of the two lenses does the light have the greatest speed and what is that speed?

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?