Question

define the following terms:
a. centre of curvature.
b. principal axis.
c. focus.
d. Radius of curvature.

waiting for the answer please give answer I will mark as brainliest.​

Answer 1

Answer:

In geometry, the center of curvature of a curve is found at a point that is at a distance from the curve equal to the radius of curvature lying on the normal vector. It is the point at infinity if the curvature is zero. The osculating circle to the curve is centered at the centre of

Answer 2

$\sf {\green {\underline {\red{\underline {♛ʙʀᴀɪɴʟʏ༊᭄Answer♛࿐ :-}}}}}$

$\sf \pink {centre \: of \: curvature}$

$\sf \red⟹$In geometry, the center of curvature of a curve is found at a point that is at a distance from the curve equal to the radius of curvature lying on the normal vector.

$\sf \orange{principal \: axis.}$

$\sf \green⟹$principal axis - 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"

$\sf \green{focus}$

$\sf \blue⟹$Focus is the thinking skill that allows people to begin a task without procrastination and then maintain their attention and effort until the task is complete.

$\sf \purple{Radius \: of \: curvature.}$

$\sf \pink⟹$The radius of curvature of a curve at a point M(x,y) is called the inverse of the curvature K of the curve at this point: R=1K. Hence for plane curves given by the explicit equation y=f(x), the radius of curvature at a point M(x,y) is given by the following expression: R=[1+(y′(x))2]32|y′′(x)|.

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