Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
(a) Give two circumstances in which a concave mirror can form a magnified image of an object placed in front of it. Illustrate your answer by drawing labelled ray diagrams for both.(b) Which one of these circumstances enables a concave mirror to be used as a shaving mirror?
(a) The two circumstances in which a concave mirror can form a magnified image of an object that is placed in front of it are:
1. When an object is placed between the pole $(P)$ and the focus $(F)$ of a concave mirror, the image formed is virtual, erect and magnified, as shown in the figure given below. Here, the object $AB$ is placed between the pole $(P)$ and the focus $(F)$ of a concave mirror, and its image $A'B'$ is formed behind the mirror which is virtual, erect and magnified.
2. When an object is placed between the centre of curvature $(C)$ and the focus $(F)$ of a concave mirror, the image formed is real, inverted and enlarged, as shown in the figure given below. Here, the object $AB$ is placed between the centre of curvature $(C)$ and the focus $(F)$ of a concave mirror, and its image $A'B'$ is formed beyond the centre of curvature which is real, inverted and enlarged.
(b) From the above-mentioned circumstances, only first circumstances, where the object is placed between the pole $(P)$ and the focus $(F)$ of a concave mirror, can be used as a shaving mirror, because, the image formed is virtual, enlarged and erect.
54 Views
