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The distance at which an object should be placed from a thin convex lens of focal length 10 cm to obtain a virtual image of double of its size is
  • a)
    - 5 cm
  • b)
    5.5 cm
  • c)
    -10 cm
  • d)
    15 cm
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The distance at which an object should be placed from a thin convex le...
Concept:
The magnification produced by a lens is given by:
And from lens makers formula.
Calculation:
v = 2u
the minus sign comes because of sign convention
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The distance at which an object should be placed from a thin convex lens of focal length 10 cm to obtain a virtual image of double of its size isa)- 5 cmb)5.5 cmc)-10 cmd)15 cmCorrect answer is option 'A'. Can you explain this answer?
Question Description
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