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Question
State the nature and position of the object on the principal axis to obtain a real and magnified image.
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Solution
Lens is convex; the position of the object is between F and 2F.
RELATED QUESTIONS
In the following figure (a) and (b), F1 and F2 are positions of the two foci of thin lenses. Draw the path taken by the light ray AB after it emerges from each lens.
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| (a) |
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| (b) |
Study the diagram shown in Fig. 5.56
what are the two other characteristics of the image?

For an object placed at a distance 20 cm in front of a convex lens, the image is at a distance 20 cm behind the lens. The focal length of the convex lens is ______.
State the condition of the following:
A ray passes undeviated through the lens.
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- The object is at the principle focus of the lens.
- The focal length of the lens is 17 cm.
- If the mirror is moved so that it is 6 cm from the lens image will also move.
How will you differentiate between a convex and a concave lens by looking at a printed page?
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Complete the following diagram and state what happens to the ray of light after refraction through the lens.



