An extended object of 10cm is placed in front of a convex lens of focal length 10cm. find the
position of the object to get an image which is four times that of an object.
Answers
Answered by
0
Answer:
Given,
f
1
=+10cm for convex lens
f
2
=−20cm for concave lens
The focal length of the combination is given by
f
1
=
f
2
1
+
f
2
1
f
1
=
+10cm
1
+
−20cm
1
=
20cm
1
f=+20cm
The correct option is B.
Explanation:
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