Exam 34: Reflection, Refraction, and Optics

A farsighted eye requires a 2.0-diopter lens to read comfortably from a book (held 25 cm in front of the eyes). The near point of the eye without the lens is

A concave mirror with a radius of 20 cm creates an image at infinity. The object was placed

The image seen in a plane mirror is

An object is placed 20 cm in front of a convex mirror of radius 20 cm. The image is

A fish is 50.0 cm below the surface of a pond (index of refraction for water is 1.33). For a viewer directly above the fish, the fish appears to be placed

When a plano-concave lens made of glass (index of refraction 1.65) is placed in water (index of refraction 1.33), its focal length

In nearsightedness, the rays passing through the eye converge before they reach the retina. To correct this, all of the following are valid (although not necessarily practical) means except for

If a material has an index of refraction of 1.33, the speed of light through it is

The color humans perceive depends primarily on the property of light we call

Total internal reflection occurs from an interface when the ray is incident

Light travels fastest

A small object is placed 12 cm in front of a diverging lens with a focal length of 3.0 cm. The image will be

A 2.00-m-tall clown looks at himself in a full-length (floor-to-ceiling) mirror. The image of his feet is placed

If the angle of incidence were not equal to the angle of reflection, the distance traveled by a light ray going on a path composed of two straight-line segments intersecting at the reflecting surface would be

The image of a flower on a 35-mm color slide is 2.00 mm high. It is to be projected onto a screen 5.00 m from the slide, and it is to appear 50.0 cm high. The focal length of the lens used is

A diver shines an underwater searchlight at the surface of the water (index of refraction 1.33) from below. The incident angle (relative to the surface of the water) for which the light will be totally reflected is

A diver swimming below the surface of a pond (index of refraction for water is 1.33) watches a light placed directly above his head, 50 cm above the water surface. The light appears to be placed

Two converging lenses of focal lengths 100 cm and 10 cm are combined to form an astronomical telescope. Its magnification is

Suppose the Earth's atmosphere can be modeled by a series of cells of air with spherically shaped interfaces and indexes of refraction increasing with depth below the "top" (upper) surface. A ray strikes the upper surface at some nonzero angle with respect to the surface normal. As it comes toward the Earth, the ray direction will cause

The radius of curvature of a plano-convex lens made of glass (index of refraction 1.65) is 25 cm. The lens is