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With the help of suitable ray diagrams, explain image formation by convex lens for following: 

(a) Object is at focus 

(b) Object is between F1 and 2F

(c) Object is between infinity and 2F1

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(a) Image formed at infinity, highly enlarged, real and inverted. 

(b) Image is formed beyond 2F2. Image is enlarged, real and inverted. 

(c) Image is formed between F2 and 2F2. Image is smaller, real and inverted.

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