Question

A concave mirror has a focal length 18 cm. what is radius of curvature​

Answer 1

Question:-

• A concave mirror has a focal length 18 cm. what is radius of curvature ?

Given:-

• Focal length = $\sf\green{ 18cm}$

To Find:-

• $\sf\blue{ Radius \: of \: Curvature}$

Solution:-

$\begin{gathered}\begin{gathered}\underline{\boldsymbol{According\: \: to \: \:the\:\: Question :}} \\\end{gathered}\end{gathered}$

$\begin{gathered}\begin{gathered}: \implies \underline{ \boxed{\displaystyle \sf \bold{\:Radius \: of \: Curvature \: = \: 2\: ( Focal \: Length) }} }\\ \\\end{gathered}\end{gathered}$

$\boxed{ \sf \red{ Putting\: all \: Values }}$

$\begin{gathered}\begin{gathered}\\ : \implies \displaystyle \sf \: Radius \: of \: Curvature \: = \: 2\: × \: 18cm\\ \\ \\\end{gathered}\end{gathered}$

$\begin{gathered}\begin{gathered}: \implies \underline{ \boxed{\displaystyle \sf \bold{\:Radius \: of \: Curvature \: = \: 36cm}} }\\ \\\end{gathered}\end{gathered}$

So, Radius of curvature = 36cm

Answer 2

Explanation:

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$\huge\pink{\mid{\fbox{\tt{QųEsTɪOη}}\mid}}$

A concave mirror has a focal length 18 cm. what is radius of curvature.

⠀━━━━━━━━━━━━━━━━━━━━━━━━

$\huge{\underline{\mathrm{Given\: :}}}$

$\sf\pink{∴Focal\: length =18cm }$

$\huge{\underline{\mathrm{To\: Find\: :}}}$

Radius of Curvature ?

$\huge{\underline{\mathrm{Solution\: :}}}$

$\sf\blue{⟼Radius \: of\: curvature\:= 2 (Focal\:Length) }$

$\huge{\underline{\blue{\mathrm{∴By\: putting\:all\: values\: :}}}}$

$\sf\red{ :⟹Radius\:of\:Curvature= 2 ×18 }$

$\sf\green{ Radius\:of\: curvature\:= 36cm}$

⠀━━━━━━━━━━━━━━━━━━━━━━━━

$\sf\red{ So, \:Radius\: of \:curvature = 36cm}$