A point object is placed at a distance of 80 mathrm~cm from convex mirror of focal length 80 mathrm~cm. The image will form at

Question

A point object is placed at a distance of 80 mathrm~cm from convex mirror of focal length 80 mathrm~cm. The image will form at (A) Infinity (B) Pole of mirror (C) Focus of mirror (D) 40 mathrm~cm behind the mirror

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/7c53cff7d52989f554cd354b505cfa62-.jpeg" /> u=-80, f=80 (1/f)=(1/v)+(1/u) ⇒ (1/80)=(1/v)-(1/80) v=40 mathrm~cm

Q. A point object is placed at a distance of $80 cm$ from convex mirror of focal length $80 cm$ . The image will form at

Infinity

Pole of mirror

Focus of mirror

$40 cm$ behind the mirror

$u = - 80, f = 80$
$\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$
$\Rightarrow \frac{1}{80} = \frac{1}{v} - \frac{1}{80} v = 40 cm$

Q. A point object is placed at a distance of 80 cm from convex mirror of focal length 80 cm. The image will form at