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Question - Refraction of Light - Image Formation in Lenses Using Ray Diagrams - Convex Lens

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ConceptRefraction of Light - Image Formation in Lenses Using Ray Diagrams - Convex Lens  

Question

(a) Draw a ray diagram to show the formation of an image by a convex lens when an object is placed in front of the lens between its optical centre and principal focus.

(b) In the above ray diagram, mark the object distance (u) and the image distance (v) with their proper signs (+ve or –ve as per the new Cartesian sign convention) and state how these distances are related to the focal length (f) of the convex lens in this case.

(c) Find the power of a convex lens which forms a real and inverted image of magnification –1 of an object placed at a distance of 20 cm from its optical centre.

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