Question

One of the following does not apply to concave mirror Focal length is negative Image distance can be positive or negative Image distance is always positive Height of the image can be positive or negative

Answer 1

Focal length is positive" is one of the option that doesn't apply for the concave mirror.

Explanation: The focal length is negative for a concave mirror since according to the Cartesian Sign, the object is placed "in front of the mirror" and the sign of the object is taken as 'negative'.

Answer 2

Focal length is positive .............