Question

Find the distance of the image, when an object is placed on the principal axis at a distance of 10 cm in front of a concave mirror whose radius of curvature is 8 cm.

(OR)

 If the object is placed on the principal axis at a distance of 10 cm in front of a concave mirror with curvature is 8 cm, what is the distance of the image?

Answer 1

Object distance u = – 10 cm 

Radius of curvature (R) = – 8 cm 

∴ Focal length f =  \(\frac{R}{2} = \frac{-8}{2}\) = – 4 cm 

Image distance = v = ?

Mirror formula : 

∴ The image distance = 6.67 cm. 

i.e., Real image is formed at same side of the mirror.