The focal length of a concave mirror is $20 \ cm$. Determine where an object must be placed to form an image,magnified two times and real.
- A$30 \ cm$ from the mirror
- B$10 \ cm$ from the mirror
- C$20 \ cm$ from the mirror
- D$15 \ cm$ from the mirror
Explore More
Similar Questions
$A$ candle flame of $3 \, cm$ is placed at $300 \, cm$ from a wall. $A$ concave mirror is kept at distance $x$ from the wall in such a way that the image of the flame on the wall is $9 \, cm$. Then $x$ is......$cm$.
Difficult
View SolutionAt what distance in front of a concave mirror of focal length $30\; cm$,should an object be placed (in $cm$) so that its real image of size three times that of the object is obtained?
Medium
View SolutionAn object $2.5 \, cm$ high is placed at a distance of $10 \, cm$ from a concave mirror of radius of curvature $30 \, cm$. The size of the image is ........ $cm$.
Medium
View SolutionThe distance of an object from a spherical mirror is equal to the focal length of the mirror. Then the image:
Easy
View SolutionDraw the ray diagram when an object is placed between the focus $(F)$ and the pole $(P)$ of a concave mirror.
Easy
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo