A convex lens has a focal length f. An object is placed at a distance between f and 2f on a line perpendicular to the center of the lens. The image formed is located at what distance from the lens?
Check your answer: D. farther than 2f
Practice 16.3.2
A convex lens has a focal length f. An object is placed between infinity and 2f from the lens along a line perpendicular to the center of the lens. The image is located at what distance from the lens?
Practice 16.3.3
An object is placed at 29.0 cm to the right of a diverging lens whose focal length is -25 cm. What is the location of the image relative to the lens?
Check your answer: A. 13.4 cm to the right of the lens
Practice 16.3.4
A thin diverging lens has focal length f = -12 cm. If an object 9 cm tall is placed 24 cm from the lens, what is the height of the image?
Check your answer: E. 3 cm tall
Practice 16.3.5
A convex, or converging, lens with a focal length of 34 cm is used to observe an image of an apple than is 80 cm away from the lens. At what distance from the lens does the image form and what type of image is it?
Practice 16.3.6
A person’s eye has a diameter of 2.5 cm and a converging lens that produces a clear, real image on the retina. When viewing an apple, the eye’s lens has a focal length of 2.4 cm. What is the distance between the apple and the person’s eyes?
Check your answer: B. 60 cm
Practice 16.3.7
A nearsighted person wants to see an apple that is 7 meters away but can only clearly see objects that are at most 62 cm away from her eyes. Eyeglasses made of diverging corrective lenses can help her to see the apple clearly. If her glasses are 2.5 cm in front of her eyes, what should be the power of these corrective lenses to allow her to see the apple?
Given the object distance and focal length of the converging lens in the figure, determine the image distance.
Suppose the image of an object is upright and magnified 1.95 times when the object is placed 17.5 cm from a particular converging lens.
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