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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 image by a concave lens when an object is placed in front of it.

(b) In the above 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 concave lens in the case.

(c) Find the nature and power of a lens which forms a real and inverted image of magnification –1 at a distance of 40 cm from the optical centre.

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