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प्रश्न
A concave lens, if kept at a proper distance from an object, can form its real image.
विकल्प
True
False
उत्तर
This statement is False.
Explanation:
Convex lenses, not concave lenses, are what create real images. Concave lenses are utilized to produce reduced and upright virtual pictures.
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संबंधित प्रश्न
Things always look small on viewing through a lens. What is the nature of the lens?
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.
When an object is kept at any distance in front of a concave lens, the image formed is always:
(a) virtual, erect and magnified
(b) virtual, inverted and diminished.
(c) virtual, erect and diminished
(d) virtual, erect and same size as object
When an object is placed 10 cm in front of lens A, the image is real, inverted, magnified and formed at a great distance. When the same object is placed 10 cm in front of lens B, the image formed is real, inverted and same size as the object.
What is the nature of lens B?
An object 60 cm from a lens gives a virtual image at a distance of 20 cm in front of the lens. What is the focal length of the lens? Is the lens converging or diverging? Give reasons for your answer.
The power of a converging lens is 4.5 D and that of a diverging lens is 3 D. The power of this combination of lenses placed close together is :
(a) +1.5D
(b) +7.5D
(c) −7.5D
(d) −1.5D
Out of the two lenses, one concave and the other convex, state which one will show the divergent action on a light beam. Draw diagrams to illustrate your answer.
The diagrams showing the correct path of the ray after passing through the lens are:
 |
 |
| I | II |
 |
 |
| III | IV |
When an object is kept within the focus of a concave mirror, an enlarged image is formed behind the mirror. This image is :
In a reading glass what is the position of the object with respect to the concave lens used?
