Question

Sign convention for mirror and lenses.

Answer 1

Answer:

upper part from line of curvature will be +'v

downward will be -ve

right side of mirror is +ve

left side of it is -ve

Answer 2

Answer:

Hope it helps you!

In case of Mirrors:

• Pole as origin
• Left side as negative ( -ve x axis)
• Right side as positive (+ve x axis)
• Perpendicular above principal axis as positive (+ve y axis)
• Perpendicular below principal axis as negative (-ve y axis)

In case of Lenses:

• Optical centre as origin
• Left side as negative ( -ve x axis)
• Right side as positive (+ve x axis)
• Perpendicular above principal axis as positive (+ve y axis)
• Perpendicular below principal axis as negative (-ve y axis)