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Question
A concave lens always forms a virtual image.
Options
True
False
Solution
This statement is True.
Explanation:
A concave lens diverges light rays, resulting in a virtual, erect, and diminished image that cannot be projected onto a screen.
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RELATED QUESTIONS
Suppose you have focused on a screen the image of candle flame placed at the farthest end of the laboratory table using a convex lens. If your teacher suggests you to focus the parallel rays of the sun, reaching your laboratory table, on the same screen, what you are expected to do is to move the:
(a) lens slightly towards the screen
(b) lens slightly away from the screen
(c) lens slightly towards the sun
(d) lens and screen both towards the sun
An image formed by a concave ______ cannot be obtained on a screen.
A real image cannot be obtained on a screen.
State two differences between a convex and a concave lens.
Which type of lens forms always a virtual image?
A diverging mirror of radius of curvature 40 cm forms an image which is half the height of the object. Find the object and image positions.
If a spherical lens has a power of, −0.25 D, the focal length of this lens will be :
(a) −4 cm
(b) −400 mm
(c) −4 m
(d) −40 cm
What are the three principal rays that are drawn to construct the ray diagram for the image formed by a lens? Draw diagrams to support your answer.
Which diagram shows image formation of an object on a screen by a converging lens?
Complete the following table for convex lens:
| Sr. No. | Position of the object | Position of the image | Nature of the image |
| 1. | Beyond 2F1 | __________________ | ________________________ |
| 2. | __________________ | At infinity | ________________________ |
| 3. | __________________ | __________________ | Real, inverted and enlarged |
