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Telescopes

Question 33 D...

Question

Question 33
Draw ray diagrams showing the image formation by a concave lens when an object is placed

(a) at the focus of the lens
(b) between focus and twice the focal length of the lens
(c) beyond twice the focal length of the lens

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Solution

(a) at the focus of the lens

(b) between focus and twice the focal length of the lens

(c) beyond twice the focal length of the lens

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Draw ray diagrams showing the image formation by a convex lens when an object is placed

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Q. Draw ray diagrams showing the image formation by a convex lens when an object is placed at twice the focal length of the lens.

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Q. Question 3
Where should an object be placed in front of a convex lens to get a real image of the size of the object?

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