Question

What do you mean by terms
1) PRINCIPAL FOCUS
2) RADIUS OF CURVATURE
3) FOCAL LENGTH

Answer 1

━━━━━━━━━━━━━━━━━━━━━━━━━

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

━━━━━━━━━━━━━━━━━━━━━━━━━

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

WHAT DO YOU MEAN BY :-

1. PRINCIPAL FOCUS
2. RADIUS OF CURVATURE
3. FOCAL LENGTH

━━━━━━━━━━━━━━━━━━━━━━━━━

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

★ PRINCIPAL FOCUS ★

IT IS A POINT ON PRINCIPAL AXIS WHERE ALL THE REFLECTED RAY ARE EITHER CONVERGED OR DIVERGED

★ RADIUS OF CURVATURE ★

IT IS A DISTANCE ON PRINCIPAL AXIS FROM POLES TO CENTER OF CURVATURE

★ FOCAL LENGTH ★

IT IS A DISTANCE ON PRINCIPAL AXIS FROM POLES TO PRINCIPAL FOCUS

━━━━━━━━━━━━━━━━━━━━━━━━━

$\bf\Large\red{ THANKS \: FOR \: YOUR}$

$\bf\Large\red{ QUESTION \: HOPE \: IT }$

$\bf\Large\red{ HELPS }$

$\Large\mathcal\green{FOLLOW \: ME}$

━━━━━━━━━━━━━━━━━━━━━━━━━

Answer 2

Step-by-step explanation:

PRINCIPAL FOCUS:

WHEN THE RAYS PARALLEL TO THE PRINCIPAL AXIS STRIKES THE REFELECTING SURFACE AND GET REFLECTED BACK AND MEET AT A POINT THAT POINT IS KNOWN AS PRINCIPAL FOCUS.

RADIUS OF CURVATURE

GEOMETRIC CENTRE OF THE MIRROR WHOSE REFELECTING SURFACE IS A PART.

FOCAL LENGTH :

LENGTH FROM THE POLE TO THE FOCUS OF THE MIRROR M