Question

an extended object of 5cm is placed in front of a concave mirror of radius of curvature 40cm produces an image which is two times that of an object. find the position and the height of the object​

Answer 1

Answer:

u=-30cm

Explanation:

f=R/2

f=-20cm

m=v/u

H/h=v/u

2=v/u

v=2u–––––1

1/v+1/u=1/f

1/2u+1/u=-1/20

1/u(1/2+1)=-1/20

1/u=-1/30

u=-30cm