The principal axis of a thin equi-convex lens is the x-axis. The co-ordinate of a point object and its image are `(– 20 cm, 1 mm)` and `(25 cm, 2 mm)`

Question

The principal axis of a thin equi-convex lens is the x-axis. The co-ordinate of a point object and its image are `(– 20 cm, 1 mm)` and `(25 cm, 2 mm)`

The principal axis of a thin equi-convex lens is the x-axis. The co-ordinate of a point object and its image are `(– 20 cm, 1 mm)` and `(25 cm, 2 mm)` respectively. Find the focal length of the lens.

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - 90 cm

5 views Answered 2023-02-05 15:29