Question

A concave mirror of f is15 cm forms an image having twice the linear dimensions of the object what will be the position of the object

Answer 1

Answer:

PHYSICS

A concave mirror of focal length 15 cm forms an image having twice the linear dimensions of the object. The position of the object, when the image is virtual, will be :

ANSWER

f=−15cm

m=+2(positionbecauseimagevirtual)

m=−

u

v

⇒v=−2u

byusingmirrorformula

−15

1

=

(−2u)

1

+

u

1

⇒u=−7.5cm

positionofobjectis7.5cm

Hence,

option (B) is correct answer.