Question

am object is placed at a distance of 4cm from a concave mirror of focal length 1cm.fnd the position and nature of the image​

Answer 1

Answer:

1/f = 1/v+1/u

1/1= 1/4+1/u

1/1-1/4=1/u

4-1/4=1/u

3/4=1/u

u = 4/3

m=-v/u

m= -4/4/3

m= -4/12

m= -0.8333

Answer 2

focal length of concave mirror is always negative