Exam 26: Geometrical Optics

An object is in front of a concave spherical mirror,and its image is 4.0 cm behind the mirror.If the focal length of the mirror has a magnitude of 5.0 cm,where is the object?

If an object is placed at the center of curvature of concave mirror,the image formed by the mirror is located

Which of the following statements about spherical mirrors is correct? (There could be more than one correct choice. )

A plant that is 4.1 cm tall is 10.3 cm from a converging lens.You observe that the image of this plant is virtual and 6.2 cm tall.What is the focal length of the lens?

An object is placed 60 cm from a convex lens with a focal length of magnitude 10 cm.What is the magnification?

An upright object is 50 cm from a concave mirror of radius 60 cm.The character of the image is

A light ray in glass arrives at the glass-water interface at an angle of θ = 48° with the normal.The refracted ray in water makes an angle θ = 61° with the normal,as shown in the figure.The index of refraction of water is 1.33.The angle of incidence is now changed to θ = 25°.What is the new angle of refraction φ in the water?

A plant that is 4.0 cm tall is placed 15 cm from a concave spherical mirror having a focal length of magnitude 20 cm.Where is the image located?

If a single lens forms a virtual image of an object,then

Light having a speed in vacuum of 3.0 × 10⁸ m/s enters a liquid of refractive index 2.0.In this liquid,its speed will be

An object is placed 50 cm in front of a concave mirror with a focal length of 25 cm.What is the magnification produced by the mirror?

An object is placed 15 cm from a spherical concave mirror with a focal length of magnitude 20 cm.If the object is 4.0 cm tall,how tall is the image?

Two plane mirrors make an angle of With each other.A light ray enters the system and is reflected once off of each mirror.Through what angle is the ray turned?

If you stand in front of a convex mirror,at the same distance from it as its focal length,

The critical angle for a substance in air is measured at 53.7°.If light enters this substance from air at 45.0° with the normal,at what angle with the normal will it continue to travel?

An object that is 75 cm tall is located 3.8 m in front of a plane mirror.The image formed by the mirror appears to be

A cell phone is placed 40 cm in front of a converging lens with a focal length of magnitude 20 cm.How far is the image of this phone from the lens?

A 1.4-cm tall flower is 4.0 cm from a spherical concave mirror.If the image of the flower is 4.0 cm tall,how far is the image from the mirror?

An image is 4.0 mm in front of a converging lens with focal length of magnitude 5.0 mm.Where is the object for this image?

An optic fiber is made of clear plastic with an index of refraction of 1.50.For what range of angles of incidence θ with the lateral surface of the fiber will light remain inside the plastic "guide" if it is surrounded by air?