All the distances measured above the principal axis are taken as

positive

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negative

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zero

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Solution

The correct option is A positive
All distances measured perpendicular to and above the principal axis are taken as positive, while those measured below the principal axis are taken as negative.

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Similar questions

Q. Distances measured below the principal axis are taken as ........

Q. From the understanding of cartesian sign convention for reflection by spherical mirror, students took part in group discussion for FA - 1 in classroom. Who is wrong in the group discussion?
Alpesh : All the distances are measured from the pole of a mirror parallel to the principal axis.
Beena : The distances measured in the direction of incident ray are taken positive.
Chamak : The height measured upward and perpendicular to principal axis is taken negative.
Daksha : The height measured downward and perpendicular to principal axis is taken as positive.

Q. All distances parallel to the principal axis are measured from the of the mirror.

The distances of points that lie above the origin, which are measured along the Y-axis, are taken as ____, and the distances of points that lie below the origin, which are measured along the Y-axis, are taken as ____.

The distances of points that lie above the origin, which are measured along the Y axis, are taken as ____, and the distances of points that lie below the origin, which are measured along the Y axis, are taken as ____.

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All the distances measured above the principal axis are taken as

The correct option is A positiveAll distances measured perpendicular to and above the principal axis are taken as positive, while those measured below the principal axis are taken as negative.

The correct option is A positive
All distances measured perpendicular to and above the principal axis are taken as positive, while those measured below the principal axis are taken as negative.