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Aman raj

· started a discussion

· 1 Months ago

Ans - positive hoga

Question:

Focal length of concave lens is–

Options:
A)

Positive

B)

Negative

C)

Either positive or negative

D)

None of these

Solution:

Ans: (b) Focal length of concave lens is Negative.

Focal length is a well known word in optical physics. Focal length is distance over which the parallel rays either converge or diverge. For convex lens the focal length is positive. On the other hand, the focal length of concave lens is negative.

Knowledge Expert

· commented

· 1 Months ago

Dear student, question is correct. Keep learning, Team TR

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