Question

An object is kept at the 3cm distance from the concave mirror of focal length 60cm.what is the position,nature and size of the image formed?

Answer 1

$\huge\underline{\underline{\bf \orange{Question-}}}$

An object is kept at the 3cm distance from the concave mirror of focal length 60cm.what is the position,nature and size of the image formed?

$\huge\underline{\underline{\bf \orange{Solution-}}}$

$\large\underline{\underline{\sf Given:}}$

• Distance of object (u) = -30cm
• Focal lenght (f) = -60cm

$\large\underline{\underline{\sf To\:Find:}}$

• Position,nature and size of the image formed

Mirror's Formula ➝

❏$\large{\boxed{\bf \blue{\dfrac{1}{f}=\dfrac{1}{v}+\dfrac{1}{u}} }}$

$\implies{\sf - \dfrac{1}{60}=\dfrac{1}{v}+\left(-\dfrac{1}{30}\right)}$

$\implies{\sf \dfrac{1}{v}=-\dfrac{1}{60}+\dfrac{1}{3}}$

$\implies{\sf \dfrac{1}{v}=\dfrac{30-60}{-60×30}}$

$\implies{\sf v=\dfrac{-1200}{-30}}$

$\implies{\bf \red{Image(v)= 40cm}}$

Characters of Image ➝

• Image is formed behind the mirror.
• Image size is large .
• Image is virtual

See Fig.