364761 Two convex lenses of focal lengths \({f_1}\) and \({f_2}\) are mounted coaxially separated by a distance. If the power of the combination is zero, the distance between the lenses is

364762 Two lenses, one convex and another concave are kept \(5\,cm\) apart. If power of lenses are \({+5 D}\) and \({-10 D}\) respectively, then power of combination is

364763 The effective focal length of the lens combination shown in the figure is \( - 60\;cm\). The radii of curvature of the curved surfaces of the plano - convex lenses are \(12\;cm\) each and refractive index of the material of the lens is 1.5 . What would be the refractive index of the liquid?

364764 Two lens of power \(15\;D\) and \( - 3\;D\) are placed in contact. The focal length of the combination is

364761 Two convex lenses of focal lengths \({f_1}\) and \({f_2}\) are mounted coaxially separated by a distance. If the power of the combination is zero, the distance between the lenses is

364762 Two lenses, one convex and another concave are kept \(5\,cm\) apart. If power of lenses are \({+5 D}\) and \({-10 D}\) respectively, then power of combination is

364763 The effective focal length of the lens combination shown in the figure is \( - 60\;cm\). The radii of curvature of the curved surfaces of the plano - convex lenses are \(12\;cm\) each and refractive index of the material of the lens is 1.5 . What would be the refractive index of the liquid?

364764 Two lens of power \(15\;D\) and \( - 3\;D\) are placed in contact. The focal length of the combination is

364761 Two convex lenses of focal lengths \({f_1}\) and \({f_2}\) are mounted coaxially separated by a distance. If the power of the combination is zero, the distance between the lenses is

364762 Two lenses, one convex and another concave are kept \(5\,cm\) apart. If power of lenses are \({+5 D}\) and \({-10 D}\) respectively, then power of combination is

364763 The effective focal length of the lens combination shown in the figure is \( - 60\;cm\). The radii of curvature of the curved surfaces of the plano - convex lenses are \(12\;cm\) each and refractive index of the material of the lens is 1.5 . What would be the refractive index of the liquid?

364764 Two lens of power \(15\;D\) and \( - 3\;D\) are placed in contact. The focal length of the combination is

364761 Two convex lenses of focal lengths \({f_1}\) and \({f_2}\) are mounted coaxially separated by a distance. If the power of the combination is zero, the distance between the lenses is

364762 Two lenses, one convex and another concave are kept \(5\,cm\) apart. If power of lenses are \({+5 D}\) and \({-10 D}\) respectively, then power of combination is

364763 The effective focal length of the lens combination shown in the figure is \( - 60\;cm\). The radii of curvature of the curved surfaces of the plano - convex lenses are \(12\;cm\) each and refractive index of the material of the lens is 1.5 . What would be the refractive index of the liquid?

364764 Two lens of power \(15\;D\) and \( - 3\;D\) are placed in contact. The focal length of the combination is