Two half convex lenses of focal lengths $$f1$$ $$=$$ $$16$$ cm and $$f2$$ $$=$$ $$21$$ cm respectively are placed such that their principal axes coincide. Both the lenses form image of a real point object O on a fixed screen as shown. The distance between object and screen is $$100$$ cm. Then pick up the correct $$statement(s)$$

Question

Infinity Learn · Accepted Answer

Let say distance between object and Lens $$1$$ is 'x'Lens formula for Lens $$1$$: $$1v$$−$$1u=1f$$ ⇒$$1(100$$−$$x)$$−$$1($$−$$x)=1(16)$$ ⇒$$x=20cm$$ or $$80cmSimilarly$$, let say distance between object and Lens $$2$$ is ‘y’Lens formula for Lens $$2$$: $$1v$$−$$1u=1f$$ ⇒$$1(100$$−$$y)$$−$$1($$−$$y)=1(21)$$ ⇒$$x=30cm$$ or $$70cm$$

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Two half convex lenses of focal lengths f1 = 16 cm and f2 = 21 cm respectively are placed such that their principal axes coincide. Both the lenses form image of a real point object O on a fixed screen as shown. The distance between object and screen is 100 cm. Then pick up the correct statement(s)

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