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To determine the approximate focal length of the given convex lens by focusing on a distant object (say, a sign board), you try to focus the image of the object on a screen. The image you obtain on the screen is always:
(a) erect and laterally inverted
(b) erect and diminished
(c) inverted and diminished
(d) virtual, inverted and diminished
Answer
For a concave mirror
- When the object is at infinity , the image is formed at the focus
- This image is diminished
- And it is also inverted
So, the correct answer is (c) - inverted and diminished
