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:- Laterally inverted and diminished
- Inverted and diminished
- Erect and diminished
- Erect and highly diminished
(b) Inverted and diminished
Explanation
When the object is at infinity, then the image is formed at the focus of the concave mirror, and the image formed in this case is always inverted and diminished (smaller in size than that of the object).
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