Question

Explain the given terms: 1.Pole 2.focal lenght 3.principal?​

Answer 1

Answer:

1)It is the centre of the margin of the spherical mirror

2)focal length is the distance between the pole and the focus in spherical mirror

3)principle axis is the line drawn from the focus

Answer 2

Answer:

pole:either of the two points at the exact top and bottom of the earth.

focal length:the distance between the centre of a mirror or a lens and its focus.

principal: