Question

Concave mirror have _____ focal length. ( Positive or Negative)

Answer 1

Answer:

Concave mirror have positive focal length.

Explanation :the focal length, is positive for a concave mirror, and negative for a convex mirror. When the image distance is positive, the image is on the same side of the mirror as the object, and it is real and inverted. When the image distance is negative, the image is behind the mirror, so the image is virtual and upright.

Answer 2

Answer:

positive

Explanation:

concave mirror have positive focal length.

convex mirror have negative focal length.