Question

mark the following parts and define each
1. Pole .
2. centre of curvature.
3. principal Axis .
4. focus .
5. apperture.
6. radius of curvature.
7. focal length.​

Answer 1

Answer:

pole: a long. thin piece of wood or metal used for especially to hold something up

centre of curvature: the centre of a circle which passes through a curve at a given point and has the. same tangent and curvarure at that point

principle axis: each of three mutually perpendicular axes in a body about which the moment of inertia is at a maximum

focus: to give all your attention to something

apperture: forumal: a small opening in something

technical: a small opening that allows light

to reach a lense

radius of curvature: the the radius of a circle which touches a curve at a given point and has the same tangent and curvature at that point

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