Question

describe the parts of spherical mirror :- center of curvature,,radius of curvature,,pole,,focus,,principal axis.​

Answer 1

Center of curvature - Centre of curvature is the centre of the sphere of which the spherical mirror is a part
Radius-Radius of curvature is the linear distance between the pole and the centre of curvature.
Pole-Pole is the mid point of a spherical mirror.
Focus-The principal focus of a spherical mirror is a point on the principal axis of the spherical mirror at which, the light rays which are parallel to the principal axis actually converge (meet) or appear to diverge after reflection.
Principal axis-The principal axis of a spherical mirroris a line going through the center of themirror that is exactly perpendicular (sometimes said "normal") to the surface of the mirror. By definition, aspherical mirror is rotationally symmetrical around its principal axis.

Answer 2

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$\bf\Huge\red{\mid{\overline{\underline{ ANSWER }}}\mid }$

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$\Large\fbox{\color{purple}{CORRECT \: QUESTION}}$

DEFINE THE FOLLOWING TERMS IN RELATION TO SPHERICAL MIRRORS

PRINCIPAL AXIS

FOCAL LENGTH

PRINCIPAL FOCUS

CENTER OF CURVATURE

RADIUS OF CURVATURE

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$\Large\fbox{\color{purple}{ SOLUTION }}$

★ PRINCIPAL AXIS ★

THE STRAIGHT LINE THAT GOES TO THE CENTRE OF THE SPHERICAL MIRROR AT RIGHT ANGLE TO THE MIRROR IS CALLED PRINCIPAL AXIS

★ FOCAL LENGTH ★

IT IS THE DISTANCE ON PRINCIPAL AXIS FROM PRINCIPAL FOCUS TO THE POLES OF SPHERICAL MIRROR

★ PRINCIPAL FOCUS ★

IT IS A POINT ON PRINCIPAL AXIS WHERE ALL REFLECTED RAYS ARE EITHER CONVERGE OR DIVERGE

★ CENTER OF CURVATURE ★

IT IS THE CENTRE OF THE SPHERE WHICH MIRROR IS A PART

★ RADIUS OF CURVATURE ★

IT IS A DISTANCE ON PRINCIPAL AXIS FROM CENTRE OF CURVATURE TO THE POLES OF SPHERICAL MIRROR

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