Question

if an object is placed at a distance of 8cm
from a concave
mirror of focal length of 20cm, discuss
nature of the image formed by drawing the
ray diagram?​

Answer 1

Answer:

Explanation:

POSITION OF THE OBJECT, U = -8 CM

FOCAL LENGTH OF MIRROR, F = -20 CM

POSITION OF IMAGE, V =?

BY MIRROR FORMULA,

1/U+1/V=1/F

1/-8+1/V=1/-20

1/V=-1/20+1/8

1/V=0.075

V=40/3

V=+13.33 CM

POSITIVE SIGN INDICATES THAT IMAGE IS FORMED BEHIND THE MIRROR.

MAGNIFICATION=-(V/U)

MAGNIFICATION=-(13.33/-8)

MAGNIFICATION=+1.66

POSITIVE SIGN INDICATES THAT IMAGE IS VIRTUAL

MAGNITUDE OF MAGNIFICATION > 1 INDICATES THAT IMAGE IS MAGNIFIED.

HENCE THE IMAGE IS :

VIRTUAL, MAGNIFIED , FORMED BEHIND THE MIRROR.

HOPE THIS HELPS.