Question

write down the sign conventions of spherical lens​

Answer 1

Answer:

The distances measured in the same direction as that of incident light are taken as positive. The distances measured against the direction of incident light are taken as negative. The distances measured upward and perpendicular to the principal axis are taken as positive

Explanation:

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Answer 2

Answer:

The sign conventions of spherical lens says that:-

• The focal length of convex lens is positive.
• The focal length of concave lens is negative.
• All the distances are measured from the optical centre of the lens.
• The object placed left of the lens,implies that light is falling from the left side of the object, hence the light falling from the object on the lens is from the left hand side.
• Allthe distances measured to the right of the optical centre at taken positive and those at the left are taken as negative.
• All the distances perpendicular to and above the optical centre are taken as positive.
• All the distances perpendicular to and below the optical centre are taken as negative.

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What is lens formula ?

The lens formula states the relationship between the object distance, image distance and the focal length of the lens.

The relationship between these elements are:-

1/v - 1/u = 1/f

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