Question

The focus length of a convex lens is 15 cm. Find out the radius of curvature of the lens ? ​

Answer 1

${\boxed{\mathfrak{ Answer}}}$

Given, f = 15 cm

We know

for a mirror, $R \: = \tt {2f}$

$R \: = \tt {2 \times 15cm}$

$R \: = {\boxed{\tt{30cm}}}$

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Answer 2

Given,

• f = 15 cm

We know

for a mirror,

R = 2f

R = 2×15

R = 30 cm

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