Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A spherical mirror forms diminished virtual image of magnification . Focal length is <img alt="\mathrm{18\ cm}" src="https

A spherical mirror forms diminished virtual image of magnification 1/3. Focal length is \mathrm{18\ cm}. The distance of the object is:

Option: 1

\mathrm{18\ cm}


Option: 2

\mathrm{36\ cm}


Option: 3

\mathrm{48\ cm}


Option: 4

infinite


Answers (1)

best_answer

Here, the given mirror is a convex mirror.
\mathrm{\text { As, } m=\frac{f}{f-u}}
\mathrm{\text { or } \quad \frac{1}{3}=\frac{18}{18-\mathrm{u}} \quad \text { or } \quad 3 \times 18=18-\mathrm{u} \quad \text { or } \quad \mathrm{u}=-36 \mathrm{~cm}}

Posted by

Ajit Kumar Dubey

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

NTA Exam Calendar 2025 Live: JEE Main, NEET, CUET schedule to be announced soon; download at nta.ac.in
anam-khan

NTA Exam Calendar 2025: JEE Main, NEET, CUET exam dates soon
anam-khan

JEE Main, NEET, CUET 2025 Dates Live: NTA to announce exam calendar soon on nta.ac.in; latest updates

Latest Question