A plano-convex lens of re \fractive \fractive \fractive index 1.5 and curved-surface radius 20 cm is in air and has focal length f₁. Another plano-convex lens of re \fractive \fractive \fractive index 1.5 and radius 30 cm is in a liquid of re \fractive \fractive \fractive index 1.2 and has focal length f₂. Find f₁/f₂.
Physics · Geometrical optics · lens and combination lens,silvered lens
A plano-convex lens of refractive index 1.5 and curved-surface radius 20 cm is in air and has focal length f₁. Another plano-convex lens of refractive index 1.5 and radius 30 cm is in a liquid of refractive index 1.2 and has focal length f₂. Find f₁/f₂.
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