The number of principal focus in lens are :-
(b) One
(a) Two
(c)
Three
(d) None of the
Answers
Answered by
1
Answer:
YOUR ANSWER IS 2(A).
Explanation:
The distance of the principal Focus (F1 or F2) from the optical centre 'O' of a lens is called its focal length. It is usually denoted by letter 'f '. Since a convex lens has two principal foci, so it has two focal lengths, known as first focal length (f1) and the second focal length (f2).
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Answered by
0
Answer:
(a) is the correct answer
Explanation:
there are two principal focus in lens
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