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Cutting of Thin Lenses

If converging...

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If converging line falls on concave lens then lines become parallel and if parallel lines fall on it then lines diverge Is this statement true??

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Q. In the following figure, if

∠ 1

∠ 5

∠ 3

∠ 7

, then the lines l and m are _____.

Q. A converging lens of focal length

20 c m

and a diverging lens of focal length

5 c m

are placed coaxially at

d

distance apart. If a parallel ray of light is incident on the converging lens and it emerges out of the diverging lens as a parallel ray, then the value of

d

Q. (i) If a transversal intersects two parallel lines then state the relation between alternate angles.
(ii) If each of the two parallel lines are parallel to the third line then what is the relation between them?
(iii) If a transversal intersects two parallel lines and the corresponding sides of two angles are parallel then what is the relation between these angles?
(iv) If AB is a line and P is a point outside it then how many lines can be drawn through P and Parallel to AB?
(v) If a transversal intersects two parallel lines such that the ratio between the interior angles on one of its side is 2:7, then find the measure of the greater angle.

Q. If l and m are intersecting lines,

l ∥ p a n d m ∥ q

, then which of the following statements is true?

Q. A diverging lens with magnitude of focal length

25 c m

is placed at a distance of

15 c m

from a converging lens of magnitude of focal length

20 c m

. A beam of parallel light falls on the diverging lens. The final image formed is :

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