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If an object is moved away from a convex mirror, then its image moves towards the principal focus and becomes smaller in size. 
  • a)
    +60 cm
  • b)
    - 40 cm
  • c)
    - 60 cm
  • d)
    + 40 cm
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
If an object is moved away from a convex mirror, then its imagemoves t...
Since it is a concave lens, image is virtual. Thus, v = -20 cm, u = -30 cm
1/v - 1/u  = 1/f
Put the above quantity in the given formula. You will get the answer.
 
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If an object is moved away from a convex mirror, then its imagemoves towards the principal focus and becomes smaller in size.a)+60 cmb)- 40 cmc)- 60 cmd)+ 40 cmCorrect answer is option 'C'. Can you explain this answer?
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