Question

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?​

Answer 1

Answer:

10 cm

as f=r/2. =20/2=10

Answer 2

${ \mathfrak{ \green{ \underline{ \underline{Question}}}}}$

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?

${ \bf{Given:-}}$

➸Radius of curvature = 20

${ \bf{ To \: find:-}}$

➸Focal length?

${ \mathfrak{ \green{ \underline{ \underline{Answer}}}}}$

As we know that,

➸$f = \frac{r}{2}$

➸$f = \frac{20}{2}$

➸${ \boxed{ \red{10cm}}}$

So, Focal length of spherical length is 10cm

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