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Thin Lenses

The document discusses properties of converging lenses, including: 1) A converging lens refracts parallel rays passing through it to converge at the principal focus. 2) The distance between the center of the lens and the principal focus is defined as the focal length. 3) A real, enlarged image is formed when the object is placed between the focal point and the lens.

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175 views5 pages

Thin Lenses

The document discusses properties of converging lenses, including: 1) A converging lens refracts parallel rays passing through it to converge at the principal focus. 2) The distance between the center of the lens and the principal focus is defined as the focal length. 3) A real, enlarged image is formed when the object is placed between the focal point and the lens.

Uploaded by

zamrafathi58
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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THIN LENSES

1. The diagram represents a converging lens forming an image of an object.

2. A student draws a diagram representing three rays of light from the point P passing through
a converging lens. Each point labelled F is a principal focus of the lens.

Which of the ray has the student drawn correctly?

3. Which statement about a converging lens is not correct?


a. A ray parallel to the principal axis of the lens is refracted through the principal focus.
b. All rays of light refracted by the lens pass through the principal focus.
c. The distance between the center of the lens and the principal focus is the focal length.
d. The principal focus of the lens is a point on the principal axis.
4. Which labelled distance is the focal length of the lens?

5. The diagram shows converging lens forming an image of an object.

Which statement about the image is correct?


6. The object is placed in front of a converging lens. The lens has a focal length f.
The lens produces a real enlarged image of the object.
In which labelled position is the object placed?

7. An object is placed in front of a thin converging lens.


The diagram shows the paths of two rays from the top of the object.

An image of the object is formed on a screen to the right of the lens.


How does this image compare with the object?
a. Is it larger and inverted
b. It is larger and same way up
c. It is smaller and inverted
d. It is smaller and the same way up

8. The diagram represents three rays from the top of O passing through the lens.

Which type of image is produced by the lens when the object O is in this position?
a. Real and diminished
b. Real and enlarged
c. Virtual and diminished
d. Virtual and enlarged
9. Which diagram shows how an image of an object is formed on a screen by a converging
lens?

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