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प्रश्न
An object is placed 10 cm from a lens of focal length 5 cm. Draw the ray diagrams to show the formation of image if the lens is diverging.
उत्तर
When an object is placed beyond F of a diverging lens, the image formed is virtual, erect and diminished. The position between the focus and the optic centre is as shown in the figure:
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संबंधित प्रश्न
An illuminated object is placed at a distance of 20 cm from a converging lens of focal length 15 cm. The image obtained on the screen is:
(a) upright and magnified
(b) inverted and magnified
(c) inverted and diminished
(d) upright and diminished
Where will the image be formed if an object is kept in front of a concave lens at a distance equal to its focal length? Draw a ray diagram to illustrate your answer.
- Name the lens which always forms an erect and virtual image.
- State whether the image in part (a) is magnified or diminished.
The diagrams showing the correct path of the ray after passing through the lens are:
 |
 |
| I | II |
 |
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| III | IV |
A virtual diminished image is formed when an object is placed between the optical centre and the principal focus of a lens.
(i) Name the type of lens which forms the above image.
(ii) Draw a ray diagram to show the formation of the image with the above stated characteristics.
When an object is kept within the focus of a concave mirror, an enlarged image is formed behind the mirror. This image is :
Distinguish between Concave lens and Convex Lens.
Distinguish between:
Concave Lens and Convex Lens
A parallel, oblique beam of light falls on a concave lens. Draw a diagram to show refraction of light through the lens.
