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what is principal axis​

Sagot :

Answer:

prin·ci·pal ax·is

/ˈprinsəpəl ˈaksəs/

nounPHYSICS

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

Answer:

a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted; "in a normal eye the optic axis is the direction in which objects are seen most distinctly"