Question

An object is kept at 12 distance in front of concave .It forms real image for time larger than object calculate distance of image from mirror

Answer 1

u=-12cm
m=-4 as the image is real
m=-v/u
-4= -v/(-12)
v=-48cm
therefore distance of image from mirror is -48cm

Answer 2

Given:

• Object is placed in front of concave mirror at a distance of 12 cm.

• It forms a real image 4x larger than object.

To find:

• Distance of image from mirror.

Answer:

• The distance of image from Mirror is 48 cm.

Explanation:

By using formula of Magnification,

Height of Image/Height of Object = -V/U

U = -12    (∵ Negative because, The object is real.)

Height of image/Height of object:

      ⇒ 4/1

      ⇒ -V/-12 = 4/1

      ⇒ 12 × 4

      ⇒ 48 cm

Therefore, Distance of image from mirror is 48 cm.