Question

ILLUSTRATION 1.23
The focal length of a concave mirror is 30 cm. Find the
position of the object in front of the mirror, so that the image
is three times the size of the object,​

Answer 1

Answer:

Yes

plz mark as brainlest

Answer 2

Answer:

1/v + 1/u = 1/f

Let the image be real. v is -ve. u is -ve. f is -ve.

v= 3 u v/u

as magnification m = -v/ -u =

1/(-3u) + 1/(-u) = 1/(-f)

-4/3u = 1/(-30) => u = 40 cm that is 40 cm infront of the mirror.