Question

Define the term magnification. write its formula also.

Answer 1

$\bf{\fbox{Definition\: of\: Magnification}}$

$\texttt{Ratio of height of the image to height of the object is magnification.}$

FORMULA:-

$Magnification = \frac{length \: of \: image}{length \:of \:object}$

$M(mirror)= \frac{h^{1}}{h}= -\frac{v}{u}$

• $\bf{M= Magnification}$
• $\texttt{h=height of object}$
• $h^1 =Height \: of\:image$
• $\texttt{v=image distance}$
• $\texttt{u=object distance}$

Answer 2

➡The ratio of height of an image (h') to the height of object (h) is called linear magnification

➡It is denoted by " m "

$\large \mathtt{\fbox{m = \frac{h'}{h} }}$

➡When magnification is positive , the image is virtual and erect

➡When magnification is negative , the image is real and inverted