A square wire frame of side 3 cm is placed 2 | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Given: Focal length $f = -10 \ cm$,Object distance $u = -25 \ cm$,Area of object $A_{	ext{obj}} = (3 \ cm)^2 = 9 \ cm^2$.Using the mirror formula

Vedclass · Accepted Answer

$4$

Vedclass · Answer

(B) Given: Focal length $f = -10 \ cm$,Object distance $u = -25 \ cm$,Area of object $A_{	ext{obj}} = (3 \ cm)^2 = 9 \ cm^2$.Using the mirror formula $\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$,the magnification $m$ is given by $m = \frac{f}{f-u}$.Substituting the values: $m = \frac{-10}{-10 - (-25)} = \frac{-10}{15} = -\frac{2}{3}$.The area of the image $A_{	ext{image}}$ is related to the area of the object by $A_{	ext{image}} = m^2 	imes A_{	ext{obj}}$.$A_{	ext{image}} = \left(-\frac{2}{3}ight)^2 	imes 9 = \frac{4}{9} 	imes 9 = 4 \ cm^2$.

$A$ square wire frame of side $3 \ cm$ is placed $25 \ cm$ away from a concave mirror of focal length $10 \ cm$. What is the area enclosed by the image of the wire? (The centre of the square wire is on the axis of the mirror and the plane is perpendicular to the principal axis).

Similar Questions

The focal length of a concave mirror is $12\; cm$. Where should an object of length $4\; cm$ be placed,so that a real image of $1\; cm$ length is formed (in $; cm$)?

$A$ square of side $3 \ cm$ is placed at a distance of $25 \ cm$ from a concave mirror of focal length $10 \ cm$. The center of the square is on the axis of the mirror and the plane is perpendicular to the axis. The area enclosed by the image of the square is ........ $cm^2$.

The distance of an object from a spherical mirror is equal to the focal length of the mirror. Then the image:

The focal length of a convex mirror is $20\, cm$. Its radius of curvature will be.....$cm$.

$A$ concave mirror of focal length $f$ in air is dipped in a liquid of refractive index $\mu$. Its focal length in the liquid will be $:$

Vedclass Test Series

Exam Paper Generator

Online Exam Module