Check sibling questions

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

concave-mirror---object-at-infinity---ray-diagaram---teachoo.jpg

 

So, the correct answer is (c) - inverted and diminished

 

 

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CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo