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Question
If the image formed by a lens is diminished in size and erect, for all positions of the object, what type of lens is it?
Solution
If the image formed by a lens is diminished in size and erect, for all positions of the object, then the lens is a concave lens.
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RELATED QUESTIONS
Define the principal focus of a concave lens.
Where must the object be placed for the image formed by a converging lens to be:
real, inverted and same size as the object?
Where must the object be placed for the image formed by a converging lens to be:
virtual, upright and larger than the object?
A converging lens of focal length 5 cm is placed at a distance of 20 cm from a screen. How far from the lens should an object be placed so as to form its real image on the screen?
Copy and complete the diagram below to show what happens to the rays of light when they pass through the concave lens:
Fill in the following blank with suitable word:
A convex lens .................. rays of light, whereas a concave lens .................. rays of light.
Construct ray diagrams to illustrate the formation of a virtual image using a converging lens,
Which of the following can form a virtual image which is always smaller than the object?
(a) a plane mirror
(b) a convex lens
(c) a concave lens
(d) a concave mirror
A concave lens forms a magnified or diminished image depending on the distance of an object from it.
Distinguish between concave and convex lens.
