Question

a concave lens has focal length of 15cm at what distance should the object from the lens be placed so that it forms an image at 10 cm for the lens also find the magnification produced by the lens

Answer 1

HEY FRIEND HERE YOUR ANSWER

I HOPE IT'S HELP YOU

MARK BRAINLIEST MY ANSWER DEAR FRIEND

THANKS.......

Answer 2

f=-15cm
v=-10cm
the equation of focal length is :
1/f=1/v-1/u
so
1/(-15)=1/(-10)-1/u
1/u=1/(-10)-1/(-15)
1/u=-3+2/30
1/u=-1/30
and
u=-30cm
and magnification equation is :
m=v/u
m=-10/-30
so
m=0.3