Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
0 votes

A lens of focal length f projects m times magnified image of an object on a screen.The distance of screen from lens is

$(a)\;\frac{f}{m-1} \\ (b)\;f(m-1) \\ (c)\;\frac{f}{m+1} \\ (d)\;f(m+1) $

Can you answer this question?

1 Answer

0 votes
Image will be real.
we know that
$\large\frac{1}{f} =\frac{1}{v} -\frac{1}{u}$
=> $\large\frac{v}{f}$$ =1+m $
$v= f(m+1)$
Hence d is the correct answer.
answered Feb 18, 2014 by meena.p

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, AIPMT Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App