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Light – Reflection and Refraction — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceLight – Reflection and Refraction1 Mark
MCQ
A student obtains a blurred image of a distant object on a screen using a convex lens. To obtain a distinct image on the screen he should move the lens.
  • A
    Away from the screen.
  • B
    Towards the screen.
  • C
    To a position very far away from the screen.
  • ✓
    Either towards or away from the screen depending upon the position of the object.
✓

Answer

Correct option: D.
Either towards or away from the screen depending upon the position of the object.
The position of object is not known whether it is at infinity or beyond centre of curvature or at centre of curvature of lens. So depending upon the position of object we have to move the lens away or towards the screen.

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