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प्रश्न
Give the position, size and nature of image of formed by a concave lens when the object is placed:
anywhere between optical centre and infinity.
उत्तर
In the case of a concave lens, when an object is placed anywhere between the optical centre and infinity, the image is formed between the optical centre and the focus. The image formed is virtual, erect and diminished.
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संबंधित प्रश्न
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
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 focal length of lens B?
When a fork is seen through lenses A and B one by one, it appears as shown in the diagrams. What is the nature of (i) lens A, and (ii) lens B? Give reason for your answer.
The following diagram in given below shows an object OA and its virtual image IB formed by a lens.
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.
The power of a lens is negative. State whether it is convex or concave.
An object is placed at a distance 24 cm in front of a convex lens of focal length 8 cm.
(i) What is the nature of the image so formed?
(ii) Calculate the distance of the image from the lens.
(iii) Calculate the magnification of the image.
Choose the correct alternative and rewrite the following:
Inside water, an air bubble behaves ....................
When an object is kept within the focus of a concave mirror, an enlarged image is formed behind the mirror. This image is :
Give two characteristics of the image formed by a concave lens.
