Parallel rays from a distant tree incident on a convex lens form an image on the screen. The diagram correctly showing the image of the tree is:

(a) A             (b) B                (c) C                  (d) D

29- C
30- A
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I think option a)
because parallel rays from object at infinity makes image on focus which is real and inverted, diminished in convex lens.
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29.(a) A      
30.(c)600.
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What are you looking for?