Question

$\huge \sf \color{red}{QUESTION}$
➪write the rules of sign convention.






${\underline{\green{❥Yes \: Sure}}}$​

Answer 1

Answer:

Rules for sign convention :

1. All distances should be measured from the pole
2. The distances measured in the direction of incident light, to be taken positive and measured in the opposite direction of incident light to be taken negative.
3. Height of object and height of image are positive if measured upward from the axis and negative if measured downward.
4. For a concave mirror 'f and ‘R’ are negative and for a convex mirror these are positive.

Answer 2

$\huge\fcolorbox{cyan}{black}{\color{blue}{★ANSWER★}}$

${\underline{\green{❥Rules for sign convention}}}$

⬇️All distances should be measured from the pole.

The distances measured in the direction of incident light, to be taken positive and measured in the opposite direction of incident light to be taken negative.

⬇️Height of object and height of image are positive if measured upward from the axis and negative if measured downward.

$\huge\fcolorbox{cyan}{black}{\color{blue}{★EXPLANATION:-★}}$

⬇️The measurement along the principal axis

always starts from C.

▶️(a) From C, if you measure a distance in the direction of incident ray (towards right in this case), the measurement is taken positive.

▶️(b) From C, if you measure a distance opposite to the direction of incident ray (towards left in this case), the measurement is taken negative.

▶️(c) The height measured above the principal axis is taken as positive.

▶️(d) The height measured below the principal axis is taken as negative.

For a concave mirror 'f and ‘R’ are negative and for a convex mirror these are positive.

${\underline{\green{❥THANK YOU ⚡}}}$