To determine the approximate value of the focal length of a given concave mirror, you focus the image of a distant object formed by the mirror on a screen. The image obtained on the screen, as compared to the object is always:
(a) Laterally inverted and diminished
(b) Inverted and diminished
(c) Erect and diminished
(d) Erect and highly diminished
Answer
- When the object is at infinity ,
- the image formed by the concave mirror will be diminished and inverted
- And it is formed at the focus of the mirror.
So, the correct answer is (b) - inverted and diminished