Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Open MARKS Web Download App
Search any question & find its solution
Question: Answered & Verified by Expert
At what distance from a biconvex lens of the focal length $F$, must be placed an object for the distance between the object and its real image to be minimal?
PhysicsRay OpticsTS EAMCETTS EAMCET 2018 (05 May Shift 1)
Options:
  • A $2 F$
  • B $F$
  • C $\frac{F}{2}$
  • D $4 F$
Solution:
1926 Upvotes Verified Answer
The correct answer is: $2 F$



Minimum distance of an object and its' real image is $4 F$. For this, object must be placed at distance $2 F$ from lens.

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.

Use on iOS or Desktop Download from Google Play