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प्रश्न
Write the three characteristics of the image formed by a convex lens of focal length 20 cm for the object at distance (i) 10 cm, (ii) 30 cm, (iii) 40 cm, (iv) 60 cm from the lens.
उत्तर
(i) For the object at distance 10 cm, the image is virtual, upright, and enlarged.
(ii) For the object at distance 30 cm, the image is real, inverted, and enlarged.
(iii) For the object at distance 40 cm, the image is real, inverted, and the same size.
(iv) For the object at distance 60 cm, the image is real, inverted, and diminished.
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संबंधित प्रश्न
What is a lens?
Name one simple optical instrument in which the above arrangement of convex lens is used.
Which of the above two cases illustrates the working of a magnifying glass?
What kind of lens can form:
am erect diminished image?
In figure , name the ray which represents the correct path of light while emerging out through
a glass block.
Study the diagram given below.
- Name the lens LL’.
- What are the points O and O’ called?
- Complete the diagram to form the image of the object AB.
- State the three characteristics of the image.
- Name a device in which this action of lens is used.
A lens forms an upright and magnified image of an object State whether the image is real or virtual
The focal length of a lens is positive. In this case, state the kind of lens.
If an object is placed in front of a convex lens beyond 2F1, then what will be the position, relative size, and nature of an image which is formed? Explain with a ray diagram.
The above image shows a thin lens with a focal length of 5m.
- What is the kind of lens shown in the above figure?
- If a real inverted image is to be formed by this lens at a distance of 7m from the optical centre, then show with calculation where should the object be placed.
- Draw a neatly labelled diagram of the image formation mentioned in (ii).
