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Kumar Verma
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Asked: 2021-12-04T09:33:48+00:00 In:

Given below are statements regarding sign conventions for reflection by spherical mirrors. Select the correct statements.

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Poll Results

6.25%[A] Both (i) and (ii) ( 2 voters )
25%[B] Both (ii) and (iii) ( 8 voters )
59.38%[C] Both (i) and (iii) ( 19 voters )
9.38%[D] Both (iii) and (iv) ( 3 voters )
Based On 32 Votes

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(i) All distances parallel to the principal axis are measured from the pole of the mirror.
(ii) All the distances measured to the left of the origin (along – x-axis) are taken as positive while those measured to the right of the origin (along + x-axis) are taken as negative.
(iii) Distances measured perpendicular to and above the principal axis (along + y-axis) are taken as positive.
(iv) Distances measured perpendicular to and above the principal axis (along +y-axis) are taken as negative.

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    1. Best Answer

      [C] Both (i) and (iii)
      All the distances measured to the right of the origin (along + x-axis) are taken as positive while those measured to the left of the origin (along – x-axis) are taken as negative.
      Distances measured perpendicular and below the principal axis (along -y-axis) are taken as negative.

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