1. Tardigrade
  2. Question
  3. Physics
  4. Focal length of a convex lens is 20 cm and its RI is 1.5. It produces an erect, enlarged image if the distance of the object from the lens is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Focal length of a convex lens is $20\, cm$ and its $RI$ is $1.5$. It produces an erect, enlarged image if the distance of the object from the lens is

KCETKCET 2016Ray Optics and Optical Instruments

Solution:

Focal length $=20\, cm$
Refractive index, $\mu=1.5$
A convex lens produces an erect and enlarged image only when a real object is placed between focus and optical centre.
image
$\therefore $ Distance $ = 15\,cm$