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

Answer:by using mirror equation,

1/f=1/v+1/u

1/15=1/u+1/10

1/15-1/10=1/u

1/u=2-3/30

1/u=-1/30

u=-30cm

Magnification,m=-v/u

m=-(-10)/30

m=10/30

m=1/3

Step-by-step explanation:

Hope it helps ....