Question

The image formed by a concave mirror of a focal length 30cm is a quarter of the object,what is the distance of the object from the mirror.​

Answer 1

↪the mirror formula is given as

1/f = (1/v) + (1/u) (1)

❄here

f = focal length = 30cm

v = image distance

u = object distance

↪we are given that

hi = ho/4

or

hi / ho = 1/4

hi = image height

ho = object height

↪now as

hi / ho = -v/u = 1/4

we get

v = -u/4

↪ so, using this in eq. (1), we get

1/30 = -4/u + 1/u

or

1/30 = -3/u

❄thus, the object distance will be

u = -90 cm

hope it helps !!☺☺

Answer 2

HEYA GM ❤

HOPE IT HELPS YOU.....

TQ ❤ ❤