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Ray Optics — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsRay Optics1 Mark
MCQ
Shown in the figure here is a convergent lens placed inside a cell filled with a liquid. The lens has focal length + 20 cm when in air and its material has refractive index 1.50. If the liquid has refractive index 1.60, the focal length of the system is
  • A
     + 80 cm
  • B
     – 80 cm
  • C
    – 24 cm
  • ✓
    –100 cm
✓

Answer

Correct option: D.
–100 cm
 –100 cm

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