Geometric Optics
Which of the following best describes what a convex lens does to parallel light rays?
Which of the following is a key characteristic of a real image?
Two lenses are placed in contact. The first lens has a focal length of 10 cm, and the second lens has a focal length of -20 cm. What is the focal length of the combined lens system?
What effect does a concave lens have on parallel light rays?
An object is placed to the left of a converging lens. According to the sign conventions, which of the following is true?
Which of the following is a characteristic of a virtual image?
An object is placed a distance from a lens, and an image is formed at a distance from the lens. If the image distance is twice the object distance () and the focal length of the lens is 20 cm, what is the object distance?
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A convex lens is being used as a magnifying glass. Where must the object be placed relative to the lens for it to function as intended?
A person is using eyeglasses with concave lenses. What vision problem are these lenses most likely correcting?
In which of the following scenarios is a real image formed?