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23 Nov 2019

A lamp is placed 1 m from a screen. Between the lamp and the screenis placed a converging lens of focal length 24 cm. The filament ofthe lamp can be imaged on the screen. As the lens position isvaried with respect to the lamp
-no sharp image will be seen for any lens position.
-a sharp image will be seen when the lens is halfway between thelamp and the screen.
-a sharp image will be seen when the lens is 40 cm from thelamp.
-a sharp image will be seen when the lens is 60 cm from thelamp.
-a sharp image will be seen when the lens is either 40 cm from thelamp or 60 cm from the lamp, but not otherwise.
Can someone please show me how to answer this question?

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Jamar Ferry
Jamar FerryLv2
9 Apr 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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A zoom lens system is a combination of lenses that produces a variable magnification of a fixed object as it maintains a fixed image position. The magnification is varied by moving one or more lenses along the axis. Multiple lenses are used in practice, but the effect of zooming in on an object can be demonstrated with a simple two-lens system. An object, two converging lenses, and a screen are mounted on an optical bench. Lens 1, which is to the right of the object, has a focal length of f1 of 5.00 cm, and lens 2, which is to the right of the first lens, has a focal length of f2 of 10.0 cm. The screen is to the right of lens 2. Initially, an object is situated at a distance of 7.50 cm to the left of lens 1, and the image formed on the screen has a magnification of +1.00.

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(b) Both lenses are now moved along their common axis while the object and the screen maintain fixed positions until the image formed on the screen has a magnification of +3.00. Find the displacement of each lens from its initial position in part (a).

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A zoom lens system is a combination of lenses that produces a variable magnification of a fixed object as it maintains a fixed image position. The magnification is varied by moving one or more lenses along the axis. Multiple lenses are used in practice, but the effect of zooming in on an object can be demonstrated with a simple two-lens system. An object, two converging lenses, and a screen are mounted on an optical bench. Lens 1, which is to the right of the object, has a focal length of f1 of 5.00 cm, and lens 2, which is to the right of the first lens, has a focal length of f2 of 10.0 cm. The screen is to the right of lens 2. Initially, an object is situated at a distance of 7.50 cm to the left of lens 1, and the image formed on the screen has a magnification of +1.00.

(a) Find the distance between the object and the screen.

(b) Both lenses are now moved along their common axis while the object and the screen maintain fixed positions until the image formed on the screen has a magnification of +3.00. Find the displacement of each lens from its initial position in part (a).

(c) Can the lenses be displaced in more than one way?

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