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Rules of Ray Diagram for Representation of Images Formed

Describe with...

Question

Describe with the help of a ray-diagram, the size, nature and position of the image formed by a convex lens, when an object is placed beyond 2F.

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Solution

The below figure shows the ray diagram for the case when object is placed beyond 2F.
Clearly, the image is diminished, real and inverted. It is formed in between F and 2F, on the other side of the lens.

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Describe with the help of a ray-diagram, the size, nature and position of the image formed by a convex lens, when an object is placed beyond 2F.

Q. An object is placed beyond twice the focal length of a convex lens. Find the position nature and size of the image with the help of a ray diagram.

Q. Describe with the help of a diagram, the nature, size and position of the image formed when an object is placed beyond the centre of curvature of a concave mirror.

Q. Draw a diagram to represent the nature, position and relative size of the image formed by a i) convex lens for the object placed at

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ii) concave lens for the object placed between

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Q. (a) For which position of an object, a real, diminished image is formed by a convex lens?
(b) Two convex lenses A and B have focal lengths of 2.5 cm and 12.0 cm, respectively. Which lens has a greater power?
(c) Describe with the help of a labelled ray-diagram, the formation of image when an object is placed in the front of a convex lens between focus and optical centre. State any two characteristics of the image formed.

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