A concave lens of focal length 20cm is placed in contanct with a concave lems of focal length 10cm what is the focal lengthvand powet of the combination?
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2
Answer:
Explanation:
Given f = - 20 cm, (sign convention) , v = - 10 cm
(∴ image formed by concave lens is virtual)
By using lens formula,
or u = - 20
Thus the object is placed at 20 cm from the concave lens
Answered by
1
Answer:
35 CM
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