2. concave lens
v = 8 cm
u = ?
f = ?
h' = 9 cm
h = 3 cm
p = ?
3. convex lens
v = 15 cm
u = ?
f = ?
h' = 16 cm
h = 4 cm
p = ?
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Explanation:
Class 12
>>Physics
>>Ray Optics and Optical Instruments
>>Lens Formula and Magnification
>>An object is placed 25 cm from a convex
Question
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An object is placed 25 cm from a convex lens whose focal length is 10 cm. The image distance is ________ .
Hard
Updated on : 2022-09-05
Solution
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Correct option is B)
Given that,
Object distance, u=−25cm,Focal length,f=10cm
From lens formula,
v
1
−
u
1
=
f
1
⟹
v
1
=
f
1
+
u
1
⟹
v
1
=
10
1
−
25
1
⟹
v
1
=
50
5−2
=
50
3
⟹v=16.66cm
Answer-(B)
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