Question

an object of size 2cm is placed at 25cm in front of a concave mirror if the magnification produced by the mirror is 4, what is the size of the image

Answer 1

$\huge\textbf\red{Answer :}$


According to question we have given;

magnification (m) = 4

u = -25cm

We have to find size of image...

Let size of image be x.

$magnification$ = $\frac{height \:of \:the \:image}{height\: of \:the \:object}$

$m$ = $\frac{{h}_{i}}{{h}_{o}}$

$4$ = $\frac{x}{2}$

x = 8

$\textbf{So, the size of the image = 8 cm}$

Answer 2

Given:

u= -25cm

h= 2cm

m= 4

To find: size of image (h')

Solution:

m=h'÷h

4= h'÷2

h' =4×2

=8cm