Question

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

Answer 1

HOLA

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Here , the radius of curvature = 20cm

$f \: = \: \frac{r}{2} = \: \frac{20}{2} = \: 10$

Hence the focal length is 10cm

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HOPE U UNDERSTAND ❤❤❤

Answer 2

$hey \: mate \: here \: is \: your \: answer...$

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$R \: = 20cm$

$f = \frac{R}{2} = \frac{20}{2} = 10cm$

$the \: focal \: length \: of \: a \: spherical \: mirror \: is \: 10cm$

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$hope \: it \: helps..$