A concave mirror has a radius …
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Test
Related Questions
Posted by Anterpreet Kaur 1 year, 8 months ago
- 0 answers
Posted by Khushbu Otti 1 year, 7 months ago
- 0 answers
Posted by Aniket Mahajan 1 year ago
- 0 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Sia ? 6 years, 9 months ago
Given ;
R = -30 cm
f = -15 cm
m = -v/u
5 = -v/u
5u = -v
Using mirror formula;
{tex}\frac 1f =\frac 1v + \frac 1u{/tex}
{tex}\frac {1}{-15} =\frac {1}{-5u} + \frac 1u{/tex}
{tex}\frac {1}{-15} =\frac {-1+5}{5u}{/tex}
{tex}\frac {1}{-3} =\frac {4}{u}{/tex}
u = -12 cm
Hence the mirror should be placed 12 cm away from the cavity to produce 5 times magnification.
0Thank You