Size of image of an object by a mirror having a focal length of 20 cm is observed to be reduced to 1/3rd of its size. At what distance the object has been placed from the mirror? What is the nature of the image and the mirror?
ScienceClass 10CBSEAnswered 27 Mar 2026
Answer
Soln:
m = 1
3
Using 1 + 1= 1
๐ฃ ๐ข ๐
Calculate u;u = โ 80 cm.
Image is real and inverted. Mirror is concave.