2 Answers

Kohei TAMURA · Answer 1 · 2021-12-03T15:23:10+0000

Answer:

$\boxed{\sf Focal \ length = 10 \ cm}$

Given:

Radius of curvature (R) of a spherical mirror = 20

To Find:

Focal length (f)

Step-by-step explanation:

Formula:

$\boxed{ \bold{\sf Focal \ length \ (f) = (Radius \ of \ curvature \ (R))/(2)}}$

Substituting value of R in the equation:

$\sf \implies f = (20)/(2)$

$\sf \implies f = \frac{ \cancel{2} * 10}{ \cancel{2}}$

$\sf \implies f = 10 \: cm$

John McCollum · Answer 2 · 2021-12-06T12:04:57+0000

Focal length = 10 cm.

Solution :

Given radius of curvature = 20 cm.

Formula :

Focal length = Radius of curvature/2

→ Focal length = 20/2

→ Focal length = 10 cm.

Answer : 10 cm.

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