Two plano concave lenses of glass of refractive index 1.5 have radii of curvature of 20 cm and 30 cm. If they are placed in contact with curved surfaces towards each other and the space betweenthem is filled with water (mu_(w)=4/3), find the focal length of the system.

Two plano concave lenses of glass of refractive index 1.5 have radii o

1.	Two plano concave lenses of glass of refractive index 1.5 have radii of curvature of 20 cm and 30 cm. If they are placed in contact with curved surfaces towards each other and the space betweenthem is filled with water (mu_(w)=4/3), find the focal length of the system.
Answer» `-50` CM 95 cm `-72` cm 40 cm Answer :C

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Two plano concave lenses of glass of refractive index 1.5 have radii of curvature of 20 cm and 30 cm. If they are placed in contact with curved surfaces towards each other and the space betweenthem is filled with water (mu_(w)=4/3), find the focal length of the system.

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