Question

The radius of curvature of a concave mirror is 22cm. Its focal length is​

Answer 1

Answer:

F= 2r

Radius of curvature = 22

Focal length = 2(22)

Focal length = 44

Hope this helps you

Answer 2

$\huge\underline\mathfrak\color{blue}Answer$

$\huge\underbrace\color{gold}focal \: length$

=} RADIUS OF CURVATURE / 2

=} 22 / 2

=} 11 ( 22 GETS CANCELLED BY 2 )

$therefore \: 11 \: is \: the \: answer$

$\huge\underline\color{silver}hope \: it \: helps$