0 votes
in Physics by (47.6k points)

The 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?

1 Answer

+1 vote
by (48.1k points)
selected by
Best answer

m = 1/3

Using ,

1/v + 1/u = 1/f 

Calculate u;u = – 80 cm. 

Image is real and inverted. Mirror is concave.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.