Question

An object is placed at a distance of 10 $cm$from a concave mirror of radius of curvature 0.6 $m$. Which of the following statement is incorrect?

• A. The image is formed at a distance of 15 $cm$ from the mirror.
• B. The image formed is real.
• C. The image is 1.5 times the size of the object.
• D. The image formed is virtual and erect.

Answer 1

Answer: (A), (C), (D)

The image formed is virtual and erect.

Focal length (f) = -30 $cm$Object distance (u) = -10 $cm$
Substitute above values in $\frac{1}{f}$ = $\frac{1}{v}$ + $\frac{1}{u}$
$\frac{1}{-30}=\frac{1}{v}+\frac{1}{-10}$
we get Image distance $\left(v\right)=15cm$
m = $\frac{-v}{u}=1.5$