focal length of one lens is - 50 cm, if I want it to behave like a converging lens of power +2D what type of lens and with what focal length should be placed in contact with it ?
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Answer:
-5 d mark me brainlist
Explanation:
Correct option is
B
−5 D
P
convex
1
=
50
100
=+2D
P
concave
1
=
−50
100
=−2D
P
concave
2
=
−20
100
=−5D
P
eq
=−2−5+2
=−5D
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