Question

The focal length of concave and convex mirror is _____ & ___________

(a) negative & negative
(b) negative & positive

(c) positive & positive
(d) positive & negative​

Answer 1

Answer:

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The focal length of concave and convex mirror is _____ & ___________

(a) negative & negative

(b) negative & positive

(c) positive & positive

(d) positive & negative

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(b) negative & positive

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Answer 2

Answer:

The focal length of the convex mirror is positive, whereas that of the concave mirror is negative. The same can also be proved by using the mirror formula: (1/f = 1/v +1/u).

Explanation:

option b