A student begins to sketch the working of a simple magnifier
PHYSICS · Subjective · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments
Problem
A student begins to sketch the working of a simple magnifier. She has already drawn a convex lens of focal length f and two incident rays originating from the tip of a small upright object placed between the lens and its focal point, but she stops before completing the construction.
(i) Complete the ray diagram you would draw to locate the final image when the eye is adjusted for normal vision at infinity.
(ii) From your completed diagram state clearly the nature (real/virtual), orientation (erect/inverted) and position of the final image with respect to the lens.
(iii) The same student now places the object 10cm from a lens of focal length 12.5cm and repeats the construction. Explain, with the help of a neat diagram or otherwise, whether a magnified virtual image can still be obtained. Justify your answer.