Question

Define the following terms for a spherical
mirror or surface :
(1) pole (2) centre of curvature (3) radius of
curvature (4) principal axis.​

Answer 1

Answer:

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Answer 2

$\large\boxed{\fcolorbox{blue}{yellow}{Answer:-}}$

$\huge\underline{\underline\mathtt{Defination:-}}$

(1) $\bf\large\underline\red{Pole:-}$

The centre of a spherical mirror or surface is called the pole of the spherical mirror or surface.

(2) $\bf\large\underline\red{Centre \:of \:curvature:-}$

The centre of the sphere, of which the spherical mirror or surface is a section, is called the centre of curvature of the spherical mirror or surface.

(3) $\bf\large\underline\red{Radius \:of \:curvature:-}$

The radius of the sphere, of which the spherical mirror or surface is a section, is called the radius of curvature of the spherical mirror or surface.

(4) $\bf\large\underline\red{Principal \:axis}$ :

The line passing through the pole and the centre of curvature of a spherical mirror or surface is called the principal axis of the spherical mirror or surface