Question

An object is placed on the principal axis of a concave mirror of focal length 5cm at a distance of 4cm from the pole . Then the position and nature of the image is​

Answer 1

Answer:

we know that

image height /object height=image distance /object distance

=>5/2=x/12

=>2x=60

=>x=30cm

we know that in case of a concave mirror where a real image is formed

1/f=1/u+1/v

1/f=1/12+1/30=5+2/60=7/60

so f=60/7=8.57cm

the focal length of it is 8.57cm

Explanation:

Answer 2

Answer:

Five cm

Explanation:

That it’s five cm