Question

define the following term with reference to sperical Mirror a. radius of curvature b. principal axis of a convex mirror c. focal length​

Answer 1

Answer:

RADIUS OF CURVATURE:the radius of sphere of which the spherical mirror is a part , is called the radius of curvature

PRINCIPAL AXIS:

it is the straight line joining pole of the mirror to its centre of curvature.

FOCAL LENGTH:

In concave mirror: the focus of the mirror is a point on the principal axis through which the light rays incident parallel to the principal axis, pass after reflection from the mirror.

In convex mirror:

The focus of convex mirror is a point on the principal axis from which, the light rays incident to the principal axis, appears to come, after reflection from mirror.

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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