5. What is the formula for combined focal length of
combination of two lenses of focal lengths f1, ana f2 when
(a) They are separated by a distance 'd'
(b) They are in contact with each other.
Urgent pls anyone pls fast
Answers
Answered by
2
Answer:
a) it is separated by some distance d
Answered by
2
Answer:
(a) (1/f)=(1/f1)+(1/f2)-(d/f1f2)
(b) (1/f)=(1/f1)+(1/f2)
Explanation:
In case (b) d becomes 0 as they are in contact.
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