The radius of curvature of the curved face of a thin planoconvex lens is 10 cm and it is…
Physics · JEE Main · NTA Exams — Optics
The radius of curvature of the curved face of a thin planoconvex lens is 10 cm and it is made of glass of refractive index 1.5 . A small object is approaching the lens with a speed of 1 cms-1 moving along the principal axis.
When the object is at a distance of 30 cm from the lens, the magnitude of the rate of change of the lateral magnification is
When the object is at a distance of 30 cm from the lens, the magnitude of the rate of change of the lateral magnification is
- 0.1 per second
- 0.2 per second
- 0.3 per second
- 0.4 per second
Answer
(B) 0.2 per second
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