Question

a concave mirror has focal length of 15 CM at what distance should the object from the mirror be placed so that it forms an image at 10 cm from the mirror also find magnification of mirror​

Answer 1

f=15cm

v=-10

1/15+1/10=1/u

LCM=30

=2+3/30

1/u=5/30

u=6

m=10/6=

1.66

Answer 2

Answer:

Explanation:

Focal length =15cm

Image distance=10cm

Object distance =?

We know that:

1/v +1/u = 1/f

1/10+1/u= 1/15

1/u= 1/15 - 1/10

1/u= 10-15/150

1/u= -5/150

1/u = -1/30

U= -30

Object is 30cm away from the mirror and is in front of the mirror