Question

Define the terms.
d) Principal axis
a) Pole
e )Aperture
b) Centre of curvature
f) Principal focus
c)Radius of curvature
g) Focal length​

Answer 1

Answer:

principal axis - each of three mutually perpendicular axes in a body about which the moment of inertia is at a maximum.

pole - A long thin piece of metal or wood used especially to hold something up.

Aperture - A small opening in something

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

principal focus -

Focus is the point where light rays originating from a point on the object converge. The principal focus is defined as the point where a beam parallel to the principal axis appears to diverge converges from a point on the principal axis after passing through the lens.

radius of curvature- 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

Explanation:

pls mark me as a brainliest